I have two RES's and up until three days ago I was quite sure they were both males. Over the last few days one of my 'boys' has been trying to dig holes with 'his' rear legs on the glass sunning platform. Tonight I took 'him' out of the tank and put 'him' into a gravel tank (no water). 'He' promptly started digging a hole and has parked 'his' rear end in it and hasn't moved since. What do I do?


