Hi! I have 2 Trans Pecos rat snakes. One is male and one is female. They are both very friendly and have always been fed seperatly. But, have been housed in the same tank for over 4 years and have never had a problem until recently... Yesterday, the bigger snake all of a sudden started acting aggressive to the other smaller snake. I would stop it every time the big one seemed to pick on the little one, but now it's just too much. It's almost like the big one is trying to assert dominance or breed, but like I said this has never happened before. Now my smaller snake has bite/puncture marks all over him/her. Does anyone know what could have caused this to happen or if I will have to seperate them permanatley? Thank you! Both of my snakes look like the attached photo.