Hello, I have one male and female bearded dragons. I have had them a year and a half to two years now. I have kept them together in the same enclosure the whole time. Haven't had any problems until now. They got along great but recently the female has been biting the male's tail and I have had to separate them. They are the same size, a little over a foot each including their tail length. I do not know their age. I would like to know, why the sudden change in behavior? I know their both different genders as I've gotten that checked. So, why is she biting only his tail?? Will I need to keep them forever separate?