never seen a dino with ears.
also try to make your topology follow the muscles and joints, u should focus on putting more geometry on parts that need to be bended, and model the tail and neck straight, this is better for animation
i made a quick sketch>
try retopo him with triangles and quads, don't stick too much to quads only , that's not necessary for games.
u'll have lower polycount and better base shape if u also use triangles
