hi, today i just bought a red tegu male 2.5 years old 3ft and have him living with my male arg tegu1.5 years old 3 ft. the red is bigger in mass and has huge jowls while my black is just starting to devolp his jowls. i interduced them in a neutral territory(my family room floor) and after no problems put them in the cage together. my red keeps making his jowls pulsate. is this a sigh i should seperate them... and what are some agressive signs i should be looking for. they are under close supervison.