Please do, I think we are all worried that we would sound like we are coming off harsh but it is odd to (at least me) that the Vet would be keeping your baby for so long for what really doesn't sound like any huge illness. Also, i'm not sure where you got this dog from but if there is a problem that your contract protects you against with the breeder you purchased the dog from there is probably a time frame in which it would have to be reported. I hope that everything works out great, that your puppy is very healthy but it worries me that the vet is keeping him. If you aren't sure what questions to ask... just ask us and we will supply you with plenty.
