im new at writing this but i got a few ideas
1 where you can be a big canine or a big feline and you can pick up people in you mouth who are a sirtan size like a cub
2 differant howls and differant roars for like differant agers of felines and canines
3 i dont no if somebody has said this one or not but making your tale move
4 im not sure about this one but it just came in my head cloths like a top for people who be german sheperds and they are a police dog they could wear a police top or police hat
5 for the canines you could do it where they could do tricks or something like sit up on 2 feet and beg or shake paw to meet another person .