Here is are some cute free animal patterns, some of them farm animals. They are felt, but it wouldn't be hard to adapt them for applique. I might try the pattern for a sheep dog she has. I love border collies!
http://www.downeastthunderfarm.com/s...tter-patterns/
I bookmarked this site too. The farm animals look like they would be darling on a child's quilt.
http://www.freequilt.com/farm-animal-patterns.html