Same here RosiesMaw. Donkey and horse hides are used too, once the animals have ceased to be useful. I check the provenance of leather items as best as I can. Something coming from Asia or India, to give just two examples, would be a complete no-no for me. Price is a good indicator before you see the label.
Talking of cat fur, I still have, for sentimental reasons, a little Father Christmas figure which belonged to my granny - his small white beard is almost certainly cat fur. I think of that each Christmas when I get it out.