The muzzle of the character looks about right to me. Of course with fantasy or cartoon drawings
it would usually be what looks right to you.
I have found for my own tastes, a longer muzzle is better for the male, and a shorter one for
the female. Then extra short for pups, and other cute characters. A large heavy one would usually
be for strong tough characters
If you want the muzzle size more realistic it's best to compare it with an image of the natural animal.
Keep up the good work.