So I found an awesome study of the anthro canine muscular structure online.

This guy is AMAZING for anthro anatomy studies: http://russelltuller.deviantart.com/ I believe this was his. I elongated the toes quite a bit for my Naakaanee people. They have big feet. Because the canine foot is not designed for balance, as they have four feet, they do not have to balance as we do. Longer toes mean more stability.

I am enamored with the elegant simplicity of the canine foot.