I have two Hermann Tortoises. One male and the other female. The male is around 12/13 years old and the female is around 11. They've been together for about 2 years and the male is always chasing her (once he's woken up usually). They sometimes sleep near each other but apart from that the female gets chased around and the male tries to mount her constantly. I feel bad for her and want to split them up. Is it advisable to do so?