Sorry to postpone the actual reveal of the result of this to the next comic, but this is my favorite combination of cards in the whole dang storyline, and I'm going to have fun with it, darn it!
Susan's legs / feet are a bit odd in the first panel, but they're intentionally odd. They're meant to look more like simplified cartoon horse-like legs than actual horse legs, hence there being little to no indication where legs / ankles / foot / hooves begin or end.
It's an odd effect, but I'm trying new things, DARN IT! I want to expand beyond every animal form being just slapping ears and tails on people, and I think deliberately cartoonish-pony is a fun one!
Which isn't to say I'm suddenly offended if anyone doesn't like it. It's subjective, DARN IT!