

16-week-old Labrador – intense overarousal biting
Our 16-week-old Labrador, Ru, has episodes where he seems to completely lose control and jumps at us, chasing and biting our ankles, legs and hands. I’m not talking about normal puppy nipping – he actively comes after us and sometimes bites hard enough to break the skin.
We’ve had him since he was 8 weeks old, and he hasn’t had any negative or traumatic experiences. He’s otherwise a friendly, bright and happy puppy.
We have a positive-reinforcement trainer and follow her recommendations quite closely. We play with him, do short training sessions and other mental work, and use sniffing activities to help him wind down. We try to make sure his needs are met without overstimulating him.
Despite all this, many times a day he just completely loses it and starts jumping at us and biting. It seems particularly likely to happen when we want to stop interacting and relax – for example, when we sit on the couch at home or on a sun lounger while we’re on holiday. Ignoring him isn’t possible because he follows and bites us, redirecting to toys doesn’t work, and physically pushing him away only escalates things.
The only thing that reliably stops these episodes is putting him in his crate, where he usually calms down quickly.
Unfortunately, we’ve had to use the crate for this so often that he’s now started actively resisting going into it, which I really don’t want.
Our trainer’s approach is kind and positive, which I really appreciate, but the usual advice of ignoring and redirecting simply doesn’t work once he’s in this state.
Has anyone dealt with this level of overarousal/arousal biting, especially with a Labrador? What actually worked when your puppy was already in full-on biting mode? And does this eventually pass as they get older and learn to regulate themselves better?