This was my experience with housing two chams in the same cage. I had a male panther and bought what I thought was a female panther. They seemed to get along just fine so I didn't worry. Well, here is the bad news. It appears that the female I bought was actually a young male and more dominent than the older one. Needless to say, the older one died. After researching and being on this forum I believe if was because they were in the same cage, I didn't notice that the older one wasn't pooping, eating or drinking. I work all day so I didn't know what was happening during the day. I know these are melleris and I have one too. The point I am trying to make is how do you know that one is being submissive to the other and not eating, pooping, drinking etc. In my personal opinion, I will never house two together again. If you want to breed, that is a different issue.