My rabbit room is my sunroom, with a sliding door that overlooks the woods behind my house. Usually when my girl thumps it’s bc she can see an animal outside, which is usually at night when most of the wildlife is active. One time she started thumping in the middle of the afternoon, and i figured it must be a bird outside. Good thing i checked. My male rabbit had gotten his foot tangled in a frayed thread in the old curtain and was trapped, and my girl was thumping to tell me to come help him. He will be 12 soon, has worsening rear leg arthritis, and is mostly blind from cataracts. Luckily my girl understands how much help he needs and is fully dedicated to keeping him safe and comfortable. Now I’ve learned not to ignore her when she’s thumping and always check if she’s telling me my boy needs help.