Billy finally got it. No, he really got it. That growling sound means stop. Who knew? He suddenly realized that when Buddy growls after Billy sits down on top of Buddy, that Buddy really doesn't like it. Not one bit.
And this time I didn't have to break out the band-aids. He's still wearing one from last week. He got it and left Buddy alone and then went to apologize to Buddy with gentle pats.
Hopefully, this is the end of warning nips.