German Shepherd Dog Forum:
food

I have a gsd who is four months old know not sure when to switch to adult food some one told me to switch at six months of age

You can switch to adult food at any time.... many people feed adult food right from the start. Just be sure it is a good quality food and your dog is getting the correct portions for his weight.

German Shepherds should never have puppy food after 12 weeks. Puppy food overloads their bodies, and your vet can verify this.