I let 9YO mudgirl have pets that I, personally, do not like.
When I was a kid, no animal my mother did not approve of lived in our house. We were not allowed to have cats, gerbils, guinea pigs, hamsters, mice or rats, because she didn’t “like” them.
Well, you know what? My kid has three snakes and a tarantula. I don’t like them, but the deal is, I don’t take care of them. Of course, she also has two dwarf hamsters, and we have two cats, but I like them and don’t mind taking care of them.
This extends to her doing things I don’t particularly care to do. As a kid, we never did anything Mom didn’t want to do (she had control issues, can you tell?) Now, my kid roller skates, bowls, rides a skateboard, rides a bicycle, all kinds of stuff I don’t find appealing. But she likes them, and I don’t see any reason to stop her just because it’s not my idea of a good time. OK, so I get to sit in the skating rink for two hours, reading a book, making a shopping list, clipping coupons, etc. while my husband and my daughter skate. So? It’s not like the world revolves around me.
Also, pretty much what Hal said. Long, long ago, I read some advice in a magazine: if your kid asks permission to do something, unless you have a valid reason for saying no, say yes. I’ve pretty much taken that to heart, and I think I’ve had happier kids because of it.