My rats never ever bit me! I have used to have 25 mice to and none of them bite either! I am surprised that your ratties bit! I have a 20 gallon turtle tank. I don't like it and want to get them a bigger one but can't afford it. I think I will always have rats. My friend also might be giveing me her 3 story bunny cage. But I have to buy it for 5 dollars! LOL. Sorry ok. What kind of toys do you have for your rats? My rats dont' liek eanythign I give them so I need to think of new things to give them!