do puppys lose there puppy coat

my german shepherd is now 5 1/2 months old and she is moulting terribly which i am surprised that she is moulting this much as it is cold and i would have thought that by now she would be needing her winter coat, so do they lose there puppy coats like they lose there puppy teeth or is there another reason for this extreme shedding, she is in excellent health, eats well, plenty of fluids, had all her jabs, overall her health is excellent she is also a very happy puppy, i have checked her coat and she has no signs of any fleas although she has been frontlined by the vet so i would be surprised if there was fleas, and her skin is in good condition.so can any one maybe have a clue as to why this is happening, this is my first puppy so i am new at this , i have experience with older dogs as i used to have rescue dogs, but as i have a disabled child i deceided to get a pup and she loves the children. so answers on a postcard please, many thanks.

Not a breed I would recommend for a first time owner with a disabled child unless the older dogs were Shepherds Too!

Yes she is shedding her coat as all pups do whatever the time of year. Adult shepherds are also shedding and growing in their winter coats. It is later this year as the weather as been mild! I hope you realise that she will shed all year round whatever the weather and needs to have a good grooming at least 2-3 times if short haired, daily if long-haired. Even with grooming they lose lots of hair and a really good vacuum cleaner is needed to cope with it. Basic training is VERY important with Shepherds and other 'guard' breeds and they require time and attention that some other breeds dont.