I brought home two bearded dragons yesterday that have lived in the same enclosure for 2 1/2 years. they were fine before i brought them home, fine on the ride, but now that i have everything all set up, they are biting each other and not letting go, getting on each other backs, bobbing their heads, blackening their beards... they are fine with me, the problem seems to be with each other. why is this happening now? stress of moving?