One of my fetishes.
I think this will be relevant to your interests, OP.
I'd love to know the source on this one if anyone knows it...
Personal favorite. I think this pair capture the moment perfectly -- the older, experienced catgirl trying to get the new one fully into costume, the younger, softer catgirl terrified of the giant buttplug getting rammed up her ass and begging not to have to do it. . . .
kitty-play, pet-play, kemonomimi ("animal ears")
It doesn't get into "furry" play until said pet wears a full furry, mascot-like, costume.
There are several websites for it:
Fetlife.com has several groups for it
There's also a Kittenplay.org or net
... the one on the left she is