~TheBaraclough and I are in agreement. Also, although I'm not much of a fan of 20s/30s animation, the cheerful expressiveness of a "Rubber Hose" style gels quite nicely with digital inking. Delightful work!
I love the expressions and character your art style gives to the pets, especially Opal, Gummy, and Angel. I particularly like how angel looks so different from the show and I would say more reflects his negative characteristics as presented in the show.
Winona's depiction here is just perfect for a dog but the Peewee cameo in this picture makes me sort of sad. I know this picture was made before the episode and have no squall with it but I really wish they had Spike keep Peewee because it is such a perfect pet for him. Because he is a dragon and has a much longer lifetime than the ponies a creature like an regenerating Phoenix is perfect for him.