First, saying that it can't be canine because it has an extra toe isn't really proof. There is a mutation called polydactylism where animals develop
an extra toe
Some info and a few images
Second... This is reaching but I just recently heard how scientists are still trying to "grow" dinosaurs. Instead of trying to do it through
cloning, they are trying to reverse evolution in animals. The article I read used a chicken as an example. Basically, they take a chicken and find the
genetic marker that made them stop growing a tail. They then flip the switch to make the chicken start growing a tail again. They de-evolve an animal
into its ancestors.
That being said, what this creature made me think of is a goat or some other hoofed animal that this was done on. Like they de-evoled the hooves into
toes. Just my two off-the-wall cents.