I always thought the grunting was when a bun was really ticked, like my rabbit Rex. He only grunted two or three times and each time it was because he wanted to be left alone. He was a loving guy but when he said “no” he meant NO. I respected that and in over 9 years only heard it a few times and he never nipped. None of my other guys ever grunted until my recently acquired bun Brando who we adopted as a baby in March. He grunts pretty much all the time and it’s when he knows I am going to pick him up. I laugh and grunt right back at him. He has never nipped, is quite a suck and he is continually pulling binkies. I’ll pick him up and he’ll be grunting the whole time and I say “yes, I know you’re stressed, how about a nice massage?” and then he just melts, eyes closed, while I give him a head to toe massage and brushing. My other bun, Casey, doesn’t like being brushed and only tolerates it during molt but he does like to be held at my shoulder and petted and he has never grunted. He also binkies a lot. So, is the grunting a stress indicator, a personality trait or what? You can’t help loving these furballs – they sure keep us on our toes! 