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			Item 503
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			<font style="display: inline;font-weight:bold;font-size:18pt;">UNITED STATES </font>
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			<font style="display: inline;font-weight:bold;font-size:18pt;">SECURITIES AND EXCHANGE COMMISSION </font>
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			<font style="display: inline;font-weight:bold;font-size:10pt;">Washington</font><font style="display: inline;font-weight:bold;font-size:10pt;">, &nbsp;</font><font style="display: inline;font-weight:bold;font-size:10pt;">DC</font><font style="display: inline;font-weight:bold;font-size:10pt;">&nbsp;</font><font style="display: inline;font-weight:bold;font-size:10pt;">20549</font><font style="display: inline;font-weight:bold;font-size:10pt;">&nbsp;</font>
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			<font style="display: inline;font-weight:bold;font-size:18pt;">FORM </font><font style="display: inline;font-weight:bold;font-size:18pt;">8-K </font>
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			<font style="display: inline;font-weight:bold;">Pursuant to Section&nbsp;13 or 15(d)</font><font style="display: inline;font-weight:bold;">&nbsp;</font><font style="display: inline;font-weight:bold;">of the </font>
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			<font style="display: inline;font-weight:bold;font-size:10pt;">Date of Report (Date of earliest event reported):&nbsp; </font><font style="display: inline;font-weight:bold;font-size:10pt;">September </font><font style="display: inline;font-weight:bold;font-size:10pt;">24</font><font style="display: inline;font-weight:bold;font-size:10pt;">, 201</font><font style="display: inline;font-weight:bold;font-size:10pt;">4</font>
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			<a name="fis_unidentified_table"></a><font style="display: inline;font-weight:bold;font-size:18pt;">MWI VETERINARY SUPPLY, INC. </font>
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			<font style="display: inline;font-size:10pt;">(Exact name of registrant as specified in its charter) </font>
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						<font style="display: inline;font-weight:bold;font-size:10pt;">Delaware </font></p>
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						<font style="display: inline;font-weight:bold;font-size:10pt;">000-51468 </font></p>
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						<font style="display: inline;font-size:10pt;">(State or other jurisdiction of </font></p>
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						<font style="display: inline;font-size:10pt;">Incorporation) </font></p>
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						<font style="display: inline;font-size:10pt;">(Commission File </font></p>
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						<font style="display: inline;font-size:10pt;">Number) </font></p>
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						<font style="display: inline;font-size:10pt;">(I.R.S. Employer </font></p>
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						<font style="display: inline;font-size:10pt;">Identification No.) </font></p>
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			<font style="display: inline;font-weight:bold;font-size:10pt;">3041 W. Pasadena Dr., Boise, Idaho 83705</font>
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			<font style="display: inline;font-size:10pt;">(Address of principal executive offices)&nbsp;&nbsp;&nbsp;(Zip Code) </font>
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			<font style="display: inline;font-weight:bold;font-size:10pt;">(</font><font style="display: inline;font-weight:bold;font-size:10pt;">208</font><font style="display: inline;font-weight:bold;font-size:10pt;">) &nbsp;</font><font style="display: inline;font-weight:bold;font-size:10pt;">955</font><font style="display: inline;font-weight:bold;font-size:10pt;">-</font><font style="display: inline;font-weight:bold;font-size:10pt;">8930</font><font style="display: inline;font-weight:bold;font-size:10pt;">&nbsp;</font>
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			<font style="display: inline;font-size:10pt;">(Registrant&#x2019;s telephone number, including area code) </font>
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			<font style="display: inline;font-size:10pt;">Check the appropriate box below if the Form&nbsp;8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: </font>
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						<font style="display: inline;font-size:10pt;">Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)</font></p>
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						<font style="display: inline;font-size:10pt;">Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12) </font></p>
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						<font style="display: inline;font-size:10pt;">Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17 CFR 240.14d-2(b)) </font></p>
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						<font style="display: inline;font-size:10pt;">Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17 CFR 240.13e-4(c)) </font></p>
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			<a name="fis_results_of_operations"></a><font style="display: inline;font-weight:bold;font-size:10pt;">Item </font><font style="display: inline;font-weight:bold;font-size:10pt;">5.0</font><font style="display: inline;font-weight:bold;font-size:10pt;">3</font><font style="display: inline;font-weight:bold;font-size:10pt;">.&nbsp; </font><font style="display: inline;font-weight:bold;font-size:10pt;">Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.</font>
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		<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">On September 24, 2014, the Board of Directors of MWI Veterinary Supply, Inc. (the &#x201C;Company&#x201D;) adopted Amendment No. 2 to the Company&#x2019;s Amended and Restated Bylaws (the &#x201C;Bylaws&#x201D;), which became effective upon its adoption by the Board</font><font style="display: inline;font-size:10pt;"> of Directors</font><font style="display: inline;font-size:10pt;">.&nbsp;&nbsp;The amendment to the Bylaws added a new Section 9 to Article VIII to </font><font style="display: inline;font-size:10pt;">designate</font><font style="display: inline;font-size:10pt;"> the state courts of the State of Delaware in and for New Castle County (or if no state court located within the State of Delaware has jurisdiction, the federal district court for the District of Delaware) as the sole and exclusive forum for: (i) derivative actions brought on behalf of the Company, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Company to the Company or its stockholders, (iii) any action asserting a claim arising pursuant to any provision of the Delaware General Corporation Law or the Company&#x2019;s Amended and Restated Certificate of Incorporation or the Bylaws, (iv) any action seeking to interpret, apply, enforce or determine the validity of the Company&#x2019;s Amended and Restated Certificate of Incorporation or the Bylaws, or (v) any action asserting a claim against the Company or any director, officer or other employee of the Company governed by the internal affairs doctrine.</font>
		</p>
		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">The foregoing summary of Amendment No. 2 is qualified in its entirety by reference to the text of Amendment No. 2.&nbsp; </font><font style="display: inline;font-size:10pt;">The full text of Amendment No. 2 to the Bylaws is filed as Exhibit 3.1 to this Report and is incorporated herein by reference.</font>
		</p>
		<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<div style="width:100%"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;width:902.25pt;margin-left:0pt;">
			<tr>
				<td valign="middle" style="width:104.40pt;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-weight:bold;font-size:10pt;">Item 9.01.</font></p>
				</td>
				<td valign="middle" style="width:798.00pt;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-weight:bold;font-size:10pt;">Financial Statements and Exhibits.</font></p>
				</td>
			</tr>
		</table></div>
		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">(d) Exhibits.</font>
		</p>
		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">Exhibit</font>
		</p>
		<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">Number</font><font style="display: inline;font-size:10pt;;font-size: 10pt;font-family:Times New Roman;text-indent:0pt;margin-left:0pt;padding:0pt 36pt 0pt 0pt;"></font><font style="display: inline;font-size:10pt;"></font><font style="display: inline;font-size:10pt;;font-size: 10pt;font-family:Times New Roman;text-indent:0pt;margin-left:0pt;padding:0pt 36pt 0pt 0pt;"></font><font style="display: inline;font-size:10pt;"></font><font style="display: inline;font-size:10pt;;font-size: 10pt;font-family:Times New Roman;text-indent:0pt;margin-left:0pt;padding:0pt 36pt 0pt 0pt;"></font><font style="display: inline;font-size:10pt;">Description</font>
		</p>
		<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">3.1</font><font style="display: inline;font-size:10pt;;font-size: 10pt;font-family:Times New Roman;text-indent:0pt;margin-left:0pt;padding:0pt 36pt 0pt 0pt;"></font><font style="display: inline;font-size:10pt;"></font><font style="display: inline;font-size:10pt;;font-size: 10pt;font-family:Times New Roman;text-indent:0pt;margin-left:0pt;padding:0pt 36pt 0pt 0pt;"></font><font style="display: inline;font-size:10pt;"></font><font style="display: inline;font-size:10pt;;font-size: 10pt;font-family:Times New Roman;text-indent:0pt;margin-left:0pt;padding:0pt 36pt 0pt 0pt;"></font><font style="display: inline;font-size:10pt;">Amendment No. 2 to the Amended and Restated Bylaws of MWI Veterinary Supply, Inc.</font>
		</p>
		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<p style="margin:0pt;text-align:center;font-family:Times New Roman;font-size: 10pt">
			<a name="fis_signatures"></a><font style="display: inline;font-weight:bold;font-size:10pt;">SIGNATURE </font>
		</p>
		<p style="margin:0pt;line-height:normal;text-align:center;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. </font>
		</p>
		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
			<font style="display: inline;font-size:10pt;">&nbsp;</font>
		</p>
		<div style="width:100%"><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;width: 100.00%;margin-left:0pt;">
			<tr>
				<td valign="top" style="width:39.58%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;height:1.00pt;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;height:1.00pt;overflow:hidden;font-size: 1pt">
						<a name="fis_exhibit_index"></a><a name="a05_14720_1ex99d1_htm"></a><a name="fis_exhibit_99"></a><font style="display: inline;font-size:1pt;">13</font></p>
				</td>
				<td valign="top" style="width:03.22%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;height:1.00pt;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;height:1.00pt;overflow:hidden;font-size:0pt;">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:07.94%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;height:1.00pt;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;height:1.00pt;overflow:hidden;font-size:0pt;">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:49.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;height:1.00pt;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;height:1.00pt;overflow:hidden;font-size:0pt;">
						&nbsp;</p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="width:39.58%;padding:0pt 6.5pt">
					<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">&nbsp;</font></p>
				</td>
				<td valign="top" style="width:03.22%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:07.94%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:49.26%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">MWI VETERINARY SUPPLY, INC.</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="width:39.58%;padding:0pt 6.5pt">
					<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">&nbsp;</font></p>
					<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">Date: </font><font style="display: inline;font-size:10pt;">September 26</font><font style="display: inline;font-size:10pt;">, 2014</font></p>
				</td>
				<td valign="top" style="width:03.22%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:07.94%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
					<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">By:</font></p>
				</td>
				<td valign="top" style="width:49.26%;border-bottom:1pt solid #000000 ;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
					<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">/s/ Mary Patricia B. Thompson</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="width:39.58%;padding:0pt 6.5pt">
					<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">&nbsp;</font></p>
				</td>
				<td valign="top" style="width:03.22%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:07.94%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:49.26%;border-top:1pt solid #000000 ;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">Mary Patricia B. Thompson</font></p>
				</td>
			</tr>
			<tr>
				<td valign="top" style="width:39.58%;padding:0pt 6.5pt">
					<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-size:10pt;">&nbsp;</font></p>
				</td>
				<td valign="top" style="width:03.22%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:07.94%;padding:0pt 6.5pt">
					<p style="margin:0pt;font-family:Times New Roman;font-size: 12pt">
						&nbsp;</p>
				</td>
				<td valign="top" style="width:49.26%;padding:0pt 6.5pt">
					<p style="margin:0pt 0pt 0pt 12.6pt;text-indent: -12.6pt;font-family:Times New Roman;font-size: 10pt">
						<font style="display: inline;font-style:italic;font-size:10pt;">Senior Vice President of Finance and Administration, Chief&nbsp;&nbsp;Financial Officer</font></p>
				</td>
			</tr>
		</table></div>
		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 12pt">
			<font style="display: inline;">&nbsp;</font>
		</p>
		<p style="margin:0pt 0pt 0pt 9pt;font-family:Verdana;font-size: 10pt">
			<font style="display: inline;">&nbsp;</font>
		</p>
		<p><font size="1"> </font></p><div style="width:100%">

		<p style="margin:0pt;line-height:normal;font-family:Times New Roman;font-size: 12pt">

			&nbsp;

		</p>

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{"company-data": {"conformed-name": "MWI Veterinary Supply, Inc.", "cik": "0001323974", "assigned-sic": "5047", "irs-number": "020620757", "state-of-incorporation": "DE", "fiscal-year-end": "0930"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-51468", "film-number": "141122782"}, "business-address": {"street1": "3041 W. PASADENA DR.", "city": "BOISE", "state": "ID", "zip": "83705", "phone": "(800) 824-3703"}, "mail-address": {"street1": "3041 W. PASADENA DR.", "city": "BOISE", "state": "ID", "zip": "83705"}, "former-company": {"former-conformed-name": "MWI Holdings, Inc.", "date-changed": "20050415"}}
Item 503
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington
,
DC
20549
FORM
8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the
Securities Exchange Act of 1934
Date of Report (Date of earliest event reported):
September
24
, 201
4
MWI VETERINARY SUPPLY, INC.
(Exact name of registrant as specified in its charter)
Delaware
000-51468
02-0620757
(State or other jurisdiction of
Incorporation)
(Commission File
Number)
(I.R.S. Employer
Identification No.)
3041 W. Pasadena Dr., Boise, Idaho 83705
(Address of principal executive offices)   (Zip Code)
(
208
)
955
-
8930
(Registrant's telephone number, including area code)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item
5.0
3
.
Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.
On September 24, 2014, the Board of Directors of MWI Veterinary Supply, Inc. (the "Company") adopted Amendment No. 2 to the Company's Amended and Restated Bylaws (the "Bylaws"), which became effective upon its adoption by the Board
of Directors
.  The amendment to the Bylaws added a new Section 9 to Article VIII to
designate
the state courts of the State of Delaware in and for New Castle County (or if no state court located within the State of Delaware has jurisdiction, the federal district court for the District of Delaware) as the sole and exclusive forum for: (i) derivative actions brought on behalf of the Company, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Company to the Company or its stockholders, (iii) any action asserting a claim arising pursuant to any provision of the Delaware General Corporation Law or the Company's Amended and Restated Certificate of Incorporation or the Bylaws, (iv) any action seeking to interpret, apply, enforce or determine the validity of the Company's Amended and Restated Certificate of Incorporation or the Bylaws, or (v) any action asserting a claim against the Company or any director, officer or other employee of the Company governed by the internal affairs doctrine.
The foregoing summary of Amendment No. 2 is qualified in its entirety by reference to the text of Amendment No. 2.
The full text of Amendment No. 2 to the Bylaws is filed as Exhibit 3.1 to this Report and is incorporated herein by reference.
Item 9.01.
Financial Statements and Exhibits.
(d) Exhibits.
Exhibit
Number
Description
3.1
Amendment No. 2 to the Amended and Restated Bylaws of MWI Veterinary Supply, Inc.
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
13
MWI VETERINARY SUPPLY, INC.
Date:
September 26
, 2014
By:
/s/ Mary Patricia B. Thompson
Mary Patricia B. Thompson
Senior Vice President of Finance and Administration, Chief  Financial Officer