If you think about it this rabbit used some critical higher level thinking. First to rescue the cat friend. Then to dig a hole in the first place. Then to push the excess dirt out of the way so more could be dug to make the hole big enough for the cat to crawl out. Then kicked back and acted like it was nothing. A very cat-like thing to do. No wonder they were buddies.
After this the cat thanked the rabbit by killing and eating it.
Them a dog came along and killed the cat, the a Puma came along and ate the dog .... etc.
Mother Nature’s a mean momma.