You can use kids’ sandbox sand to make a dig box. Its sold in small sacks and its been treated with heat so kids dont get bad bacteria etc on their skin. Just keep a close eye until you know your bun will not eat the sand. Some horses and rabbits will eat sand, and its very bad for them. If your bun is the type of bun that will eat the sand, you can use the sand yourself by mixing it up with potting soil. If youre in the Northern hemisphere, this time of year is perfect for starting a little “bunny garden” in your window. You can grow yummy herbs like basil, parsley, herb fennel and cilantro 😃
Your other bunny was probably upset that you were messing with his box. The most important thing to do in such a circumstance is to NOT back off. If you back off, the bun will “think” Yay, success! So next time you come to do sth in his area, hell try lunging and biting again, because it worked the last time.
One option is to change his litter when he’s out having play time. Another is to wear gloves while you clean out the box, if your bun is the type that bites you really hard.
The bun is of course acting out of instinct, not out of dislike of you. I have one bun who was like this when I first got him. Knowing that animals (and humans tbh) learn by trial-and-success, I chose to just get on with whatever I was doing. Thereby I was showing my bun 2 things:
1. Aggression/violence wont work.
2. The cleaning of the box doesn’t result in catastrophy and mayhem. It actually makes the box nicer to use.
As for jumping into your lap and biting you: Rabbits often try to communicate with their mouths. They cant speak, and they cant communicate via facial expression. They cant read our ear position and we dont even have tails. We dont have fur, so a nip will cause us a lot more pain than it would another rabbit.
A nip is not a bite, although a nip can still be painful. It often means “you’re in my way, move!” or “who said you could stop petting me?!” You can let out a squeal to let the bun know that you dont appreciate being nipped.