What exactly do you mean by your "canine model stopped working"? Do you mean that nothing appears when you click on "canine" in character or preset maker? A screenshot would be appreciated, though it's alright if you can't supply one
However, would you mind sharing what you have in your "models" folder? (FH > media > models) You should have thirty canine mesh and skeleton files in total; one body skeleton, one body mesh, eight ears, eight manes, four tail meshes, one tail skeleton, and seven tuft meshes. Make sure you have all of those