I made a small selection of sites related to Farm Animals, I have over 25 links, but they are mostly lesson plans, coloring pages, activity pages, etc. I think you already have several links now on coloring, so I decided to send you the ones that I found have appeal to very young or even older children, are educational and/or interactive and can be tied to your crafts.
Farm Animals for Toddlers http://www.magickeys.com/books/farm/index.html
(And don't forget DLTK's Farm Animals section!)
And Blair added the following coloring page site http://www.thefamilycorner.com/dir/Family/Kids/Coloring_Pages/Animals/Farm/