My husband and I had purchased a hatchling Leopard tort at the end of August. The store owner thinks it is male. We decided to get another one, and just brought it home today (the beginning of October). They got along fine at first, but after about a half hour together the first one started pushing his nose into the other one. It looked like he was sniffing the new one. He then bit the front leg of the new one. They are both hatchlings. Is this normal? Should we be concerned that they are going to cause harm to one another?