Just to set your mind at ease, talk to your vet about xraying your pup's elbows and sending the films to the Orthopedic Foundation for Animals. Sometimes, things like elbow dysplasia can cause the toes to turn out. The OFA is a great resource--it'll cost you the vet visit, the cost of the xrays and the fee for OFA (less than $35 as I recall).
Elbow dysplasia can be very subtle, especially in such a young pup. We've found that our local vets can't usually see the signs on xrays, but the experienced staff at the OFA can. If you find out there's a problem, best to find it out early and take steps before things get worse. And if nothing is found, what a load off your mind!
I hope everything checks out okay!