So, here's the situation. I got my two little girls two days ago. The employee I talked to said that he handled the rats everyday he worked, and seemed to really care fore them. The first day I brought them home, and I left them alone and let them adjust to their new cage. The next day I started putting my hand in the cage to let them sniff it. This is when I started getting a little concerned because one of the girls, named Tex, would come up to sniff my hand and then kept attempting to bite it. I don't think it is fear because she would actually come to me. Then today I started offering them stuff like fruit on the palm of my hand. At this point I had the back of my hand flat on the cage floor with the food in my palm. Tex actually came up and bit the side of my pointer finger, close to the knuckle. It was kind of hard. It only drew a tiny pin prick of blood. I'm confused as to why she would do this?? The other girl is great. Doesn't nip at all and is way more timid.