You know, I was reading about how lions make a low rumbling noise that is almost too deep for humans to hear and how all those animal experts can't figure out why, and the first thing I thought was duh! They're purring. That cougar story reminded me of that.
We have foxes around here. I saw one on the way to work darting across the road! There is a big field behind my dad's house where he goes walking, and he keeps up with the family of foxes out there. He was all excited one year because they had kits and he was able to hide and watch the little ones out playing.