Yeah, they sure do. When the oldest of my cats cleans one of the
younger cats, they both Purr like crazy. I've read that the purr is an
involuntary response to something that is pleasurable to the cat.

I love to hold the cats, pet and scratch them and when they get their
purr going real good, I put my ear against them and close my eyes. The
sound and feel of the purring is very comforting and relaxing to me.

A good question -- when Bubba was with us, I'd see him and Archie
grooming each other occasionally (very rarely, actually), but I don't
know if they were both purring then or at any other time.  Sort of
seems they would be.  I have heard the mother will purr to signal her
kittens but don't know too many details of that.

Barb

Yes.