Did the vet say anything about what cud hv caused the shedding? As far as I am aware of, shedding can be caused by several reasons. One of them is the diet of your dog....hv u been feeding anything extra or introduced a new food to your min pin's diet lately? It cud be due to some sort of allergies. Other reasons could be bacterial infections in which case antibiotics are usually prescribed and results are usually seen after a few weeks. Mange and ringworms are also a cause of excessive shedding. Your vet may be the best person to advise you on this as he has already given your dog a check-up.
These are some of the reasons I can think of....maybe other members here can shed some more light (not hair) on this.
Today I took my rotti to the vet for the same problem onlyt that izac was losing hair on his belly, the vet gave him anti-biotics (a jep) and some pills oh! some cream too. Iwas going ehhhh.. thank god you brought this topic up. He said it was because of the food but I have been feeding him the same food since he was 2monts.(still on puppy food)
If your puppy is stepping into adulthood, shedding of fur or replacement of puppy fur to adult fur is normal, it is called "moulting". A dog usually moults once or twice a year.
Shedding can also be caused by friction or activities, eg. of areas around the legs, butt or belly, depending on your dogs movement.
If shedding is due to rashes then the antibiotic will come in handy and perhaps detail follow up is necessary. But typically, a vet always give antibiotic jab, creams and pills for everything under the sun. Even if there is no cause to worry.