+1 on Pat's comment. Both my kids regularly walk thru poison ivy and the only one that shows any sign of it is me…after they've rubbed up against me.
On the other hand, I do find bumps, scabs, scrapes, etc., from the rough housing that both Brando & Ruby do. I've seen Brando take his paw and smack Ruby hard across the face to get her to play. I've seen Ruby flip Brando with a roundhouse. I've seen Brando bite Ruby's legs to get her to play. I've seen Ruby grab the extra skin on Brando's neck and flip him off the couch. Yeah, things are a little rough in my house :rolleyes:, so I don't wonder there are bumps & scrapes. The only time I've ever heard either squeal is if one bites a little hard on a leg (usually Brando on Ruby's leg), but that has never stopped the play. And considering how rough it is, I'm amazed how rarely I hear any noise.
I love watching it though...and they both seem to thoroughly enjoy it.