Is a 13 month old GSD puppy or an adult? When do a GSD start eating adult food? My dog is a 13 month old GSD.

They don't monitor this. You need to call them and ask

For a GSD I would switch to an adult food at around 15 months. Royal canin makes a breed specific diet for German Shepard puppies up to 15 months of age. Learn more about dog foods by calling and talking to your local vet clinic ;)

Most dog food bags has a guide on the back. I have found that some say 1yr and others say 2. Learn more about dog foods on Chewy.com. Pedigree has more corn & flavoring than nutrition.