This is an example of anthropormorphic taxidermy.
Yes, those are real felines.
I came across this at work while dealing with the journal "Victorian Literature and Culture" and noticing an article included in volume 35:2 (2007) titled "Anthropomorphic taxidermy and the death of nature: the curious case of Hermann Plocquet, Walter Potter, and Charles Waterton," by Michelle Henning. It's illustrated, too.
Working in a library is never boring.