Even if he wanted to go with an "unusual pet"I've never met a kid who wanted a pony. Its like one of those stereotypes that adults perpetuate about kids that rarely happens. Most kids usually want a dog or something. I think it would be more in-character for Sally to own a shit ton of puppies or something instead of a horse that can somehow live in a restrictive environment like a suburb. Unless Enter makes an episode where Gumdrops gets depressed and they have to put her down which in tern teaches the family about dumb decisions, I think its really retarded and nonsensical.
Ferrets, chinchilas etc are a thing