I have a 5 yr old male woma. Three months ago I put him in a larger enclosure. 4'x2'x2' pvc, radient heat panel, thermostat set to 80 degrees. Two hide spots. An upgrade from a blanket rack. Since he has been in the enclosure he has become extremely nippy. He used to be puppy dog tame. Is there anything I can do to calm him down. He is happy, he just seems TOO HAPPY!