Hi, I am new to the forum and to rats. My three kids (7, 4, and 18 months) really wanted a pet. We had fish in the past and since we are renting can't have any large pets. I decided on rats after reading lots of articles about how smart they are and how good they are with kids. We got two boys back in the beginning of January. One of them is great; Really easy to hold, never nips, explores, takes treats, etc. The other one was much more skittish. He was nippy at first, but then bit my wife hard and caused her to bleed really good. He then bit my toddler twice when he put his finger through the cage. These were hard bites that caused deep cuts and bled a lot. I know putting fingers in a cage is a no-no, but we never feed through the cage and the other rat doesn't have this problem. He also has tried to bite me with a towel on my hand. It's not an exploratory bite, but a very hard bite trying to cause damage. Well, today when we had the rats out to play he bit the toddler again. My son was just sitting there with his hands on the couch watching the rat and he went up and bit him hard. Again, a super hard deep bite that bled all over. I'm at the point where I am about to take him back. This seems to be getting worse. Any suggestions? I'm really frustrated because pet rats seemed like a great option and this has been nothing but a struggle since we got them.