
It's age wouldn't worry me at all, and it's quite normal for a pup this age to bite. I wouldn't give a blanket 'go for it' though without asking what breed or type it is? Is this a breed that you're used to?
The reason I ask is that a friend of mine, who has only ever owned gentle sighthounds, went to view a HPR type puppy. Puppy was really hyper, but then puppies can be, he got her but she never ever calmed down and he did regret changing breeds