Not going to flame, but I agree, you need a better food for your pup. Wanted to share my story of my last GSD and his food.
We already had a cat when we bought our GSD puppy, and had to wait a couple more weeks til we could bring him home. Had the cat in for an appointment, so I asked the vet what food she recommended for him. She owned a GSD and recommended I do some research about it, so as to prevent him from growing too fast for pano/HD reasons. She said most puppy foods weren't recommended for large breeds for that reason.
So I did some searching, found out about BARF (this was well over 10 years ago and BARF was pretty much all that was said about raw that I found). Decided I couldn't do BARF, so I found a GSD forum, and it had a sticky with a list of foods in order of how good they were considered to be. Out of the top 5 on the list, the one I had easiest access to was Nutro Naturals Lamb and Rice (ADULT DOG FOOD). (Military commissaries sell it, so that was important with how often we move)
From 8 weeks old, he was on the Nutro. When he was about 2 years old, we had to go on emergency leave and leave him with a neighbor for a month. We kept our food in a kibble container, so she had no idea what we fed him when she ran out of his food, so she fed him Dog Chow, just like she fed her dogs. Being a good friend, she made sure we had a bag when we got home, so we didn't have to rush right out for food.
I can't stand to waste stuff, so we fed it to him. His poop piles went from "small" to HUGE. He went poop more often. He ate a LOT more. (We free fed, and he was always the perfect weight according to the vet.) He finished that huge bag of Dog Chow in about a third of the time it would take him to go through a bag of Nutro.
Even though the Nutro was more expensive PER BAG, it was CHEAPER overall to feed it, PLUS there was MUCH less poop to clean up.
I know there are folks here who don't care for Nutro, and I know there are better foods available than Nutro, but if I were going to feed Storm kibble, I wouldn't hesitate to feed the Nutro Naturals Lamb and Rice again. My dog was never sick, never limped, and was always in great shape according to the vet. I never did xrays for dysplacia because I never had a reason to, but we never had any pano, and that made me a believer in "decent" adult foods for large breed dogs.
Storm - born deaf, May 25, 2013