We are very hands on with our rats, and recently have started building a safe play area in the living room so they can run around more. One seems to get real excited about it when we let her in. When she is playing we pet her, and knowing that when rats play or even fight they go for the backside area Ill tickle her just above her tail and she gets jumpy and comes at my hand. While she has never done anything aggressive or bitten, in fact the worst she has done is bound around the play area and wait for another go it seems. My question is, is this something I shouldn't do, like teasing a dog, or is it something that the rat will just consider play?