We have had one B&W tegu for about a year, and the pet store couldn't tell us boy or girl, but thought boy. Then we just got 2 more at an expo, and were told boy and girl, and we thought great, this would help us sex the one we already have. But they all look the same to us. Can anyone tell? We honestly have no idea how old any of them are as they've passed hands a few times before coming to us.