First of all, can I just say, HE’S SO FLUFFY!!!! Omg so cute! LOL ok got that out of my system!
Bunnies will nip at each other to communicate, and through all that fur a nip that feels hard to us may not feel like much to a bunny.
When he nips you, have you tried squealing (imitating the bunny scream noise)? That can let them know they are hurting you and it often works.
I’m not too sure about the digging after pets. My Bunston used to do that to me after a nail trim, so I knew it was because he was mad at me. Zooming around after makes me think maybe he just has a lot of energy at those times and it is coming out as digging and zooming. Maybe you could make him a digging box for inside, since it sounds like he really likes digging?
Try to pay close attention to how you react after these nipping and digging behaviors, you might be unintentionally rewarding them and reinforcing them (by giving him more pets, food, or a toy).
Bunnies really can’t be “trained” with negative reinforcement, but sometimes a loud noise or a spritz of water is enough to distract them from the problem behavior so they move on to something else.
Another thing to think about, is sometimes in dogs you can actually help with negative behaviors by actually training the dog to them. For example, if a dog barks all the time, sometimes you can train them to bark on command, which coincidentally makes the dog less likely to just bark unless they are asked to.
I wonder if clicker training might be good for you and Onix, because you could give him a command to do something beneficial when he is getting into trouble?
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.