i just pointed out a few flaws in the modeling. some of it wont even matter but i think some of it will. for instance in the neck and how you did the forepaws.
i once heard that you should always have your loops, for the most part, even. like dont have a bunch of small faces and a bunch of large faces. try and make them the same size. (i know its impossible to do that when u make different parts of the model like the face and the body. but i hope i explained myself so u know what i mean.)
i kind of drew on ur render

but im trying to help. heres some things that i saw that could be changed. it really shouldnt take u long to make the changes and u really dont even need 2 change it unless its hard to rig it like u have it.
i hope i helped atleast a little.