Some birds do not have the toes pointing back. Others have oddly shaped toes. Also, some birds, such as the roadrunner, have two toes pointing forward and two toes pointing backward. C. Cats Cat tracks are very round in overall shape. I have noticed that the front two toes are slightly offset from each other.
Most field guides show the two front toes right next to each other.
In cat tracks in my area, at least, the front two toes are not exactly side by side. B. Coyote Coyote tracks are very egg-shaped. The outer two toes are larger than the inner two toes. Claw marks are usually visible. C. Opposable thumbs Opossums have opposable thumbs which help them grip things.