I grew up in the mountains of Southern California (Lake Arrowhead) and volunteered with a wildlife rescue there, so got to be part of some really fun relationships with wild animals...well, wild turned softies, for the most part
Did you know that racoons purr, too? They sound just like kitties, but a little whinier. It's adorable! Baby racoons are incredibly like kitties and mama cats make very good surrogates for racoons. They purr and kneed their mamas just like kitties do
Also, it used to be believed (and in fact many people still believe this myth) that cats that can roar can't purr, but then they started studying mountain lions and Bengal Tigers and Cheetahs and Snow Leopards...all of whom purr. Logic (and science!) said that if Bengals purr...then other tigers MUST have this capacity. And if Mountain Lions and Snow Leopards purr (they're very very closely related) then so must their brothers, the jaguar and the leopard. Also, Cheetahs purr....LOUDLY. After more observation and study and interviewing people, they discovered that ALL CATS in fact purr. All of them!
Even lions! The big difference is that large cats which roar (tigers and lions mainly) only purr on the exhale, instead of the inhale AND exhale, like other cats.
Pretty cool, eh?
P.S. Purring in big cats is NOT "chuffng". Just wanted to make the distinction