About digging bunnies. When we first got our abandoned rabbit from a city park, I didn't know much about rabbits. I thought she'd like to be in the back yard in a pen. Rabbits like outdoors right? When I first put her in the pen she tried aggressively to escape. She was jumping trying to get out. I increased the height of the pen. (At this stage I didn't really understand the rabbit was terrified to be outside in an open pen.) Once Bunny knew she was going to be in the pen, she started digging a bunny hole. Absolutely impressive for a 8 pound rabbit. She moved enough dirt out of the hole to fill 1 and 1/2 wheelborrows of dirt. Once she got her bunny hole dug, she refused to come out only to eat. Basically she was in her bunny hole 23.75 hours a day! She was frightened to outside. I got a pillow, and when I fed her and she came out of the hole, I threw the pillow on her bunny hole so she couldn't go underground. I caught her and brought her into the house. For the rest of her life, she lived in out house. She never lived in a cage. Excellent litter box manners.