DLTK's Crafts for Kids
Farm Animal Crafts and Activities for Kids
I know that these days there are ostrich farms, bee farms, fish farms, buffalo farms and alligator farms. And then there are all the wild animals you'll find around the farm such as rats, foxes, frogs, barn owls, spiders and butterflies.
But for this section I'm just sticking with your plain old-fashioned barn animal type animals.