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<font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 18pt; FONT-WEIGHT: bold">UNITED STATES</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">CURRENT REPORT</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Date of Report (Date of earliest event reported):&#160; September 12, 2013</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 18pt; FONT-WEIGHT: bold"><a name="fis_unidentified_table"><!--EFPlaceholder--></a>MWI VETERINARY SUPPLY, INC.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">(I.R.S. Employer</font></div>

<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Identification No.)</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">3041 W. Pasadena Dr. Boise, Idaho 83705</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Check the appropriate box below if the Form&#160;8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</font></div>

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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Written communications pursuant to Rule&#160;425 under the Securities Act (17 CFR 230.425)</font></div>
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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Pre-commencement communications pursuant to Rule&#160;14d-2(b)&#160;under the Exchange Act (17 CFR 240.14d-2(b))</font></div>
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<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Pre-commencement communications pursuant to Rule&#160;13e-4(c)&#160;under the Exchange Act (17 CFR 240.13e-4(c))</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold"><a name="fis_results_of_operations"><!--EFPlaceholder--></a>Item 7.01.&#160;&#160;Regulation FD Disclosure.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Attached as Exhibit 99.1 and furnished for purposes of Regulation FD is an Investor Presentation given by the Company at the CL King Best Ideas Conference on September 12, 2013.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The information in this report (including Exhibit&#160;99.1) is being furnished pursuant to Item 7.01 and shall not be deemed to be &#8220;filed&#8221; for purposes of Section&#160;18 of the Securities Exchange Act of 1934 (the &#8220;Exchange Act&#8221;) or otherwise subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The following exhibits relating to Item 7.01 shall be deemed to be furnished, and not filed:</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160;&#160;&#160;&#160;&#160;&#160;&#160;99.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; MWI Veterinary Supply, Inc. Investor Presentation.</font></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; 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></div>

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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">MWI VETERINARY SUPPLY, INC.</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Date:&#160; September 12, 2013</font></div>
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<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Mary Patricia B. Thompson</font></div>
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<div style="TEXT-INDENT: -18pt; DISPLAY: block; MARGIN-LEFT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="FONT-STYLE: italic; DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Senior Vice President of Finance and Administration, Chief&#160;&#160;Financial Officer</font></div>
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form8k.htm
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 12, 2013
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:
q
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
q
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
q
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
q
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 7.01.  Regulation FD Disclosure.
Attached as Exhibit 99.1 and furnished for purposes of Regulation FD is an Investor Presentation given by the Company at the CL King Best Ideas Conference on September 12, 2013.
The information in this report (including Exhibit 99.1) is being furnished pursuant to Item 7.01 and shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934 (the "Exchange Act") or otherwise subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act.
Item 9.01.  Financial Statements and Exhibits
(d)           Exhibits
The following exhibits relating to Item 7.01 shall be deemed to be furnished, and not filed:
99.1         MWI Veterinary Supply, Inc. Investor Presentation.
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.
MWI VETERINARY SUPPLY, INC.
Date:  September 12, 2013
By:
/s/ Mary Patricia B. Thompson
Mary Patricia B. Thompson
Senior Vice President of Finance and Administration, Chief  Financial Officer