I have 2 Uromastyx roughly 10-12" long. They have a hot spot of about 100. I know the tank is too small. They're in a 29 tall. They never came out of their hide so we downsized the tank. Now they come out a bit more often. We THINK one is male the other we THINK is female. They used to get along real well but now the "male" constantly attacks the "female" but leave no visible wounds. Any ideas on the behavior change? Any ideas on what size tank I should upgrade to? All help appreciated!