Hey there, I just bought this bearded dragon from Petsmart, they told me it's 5 months old and I'm having a hard time believing that, he's very small for 5 months. They said it could be a rankins dragon and they have no way of knowing, which would explain the size. I'm kind of worried because I like bearded dragons for their size. Can anyone tell me if this is a bearded or a rankins dragon? And maybe what kind of bearded it is? The employees at petsmart didn't really seem like they knew anything about him. He's in a 40 gallon tank, does anyone have any tips on how to ensure he grows as large as possible? Thanks!