class Dog:
    species = 'mammal'
    def __init__(self,name,age):
        self.name = name
        self.age = age
dog1 = Dog("Philo",5)
dog2 = Dog("Mikey",6)

print("{} is {} and {} is {}.".format(dog1.name,dog1.age,dog2.name,dog2.age))

if dog1.species == "mammal":
    print("{} is a {}!".format(dog1.name,dog1.species))