Whether or not you go with a grain inclusive or grain free food doesn’t matter too much as long as it doesn’t have a ton of it and the dog does fine on it. Many of us use growth foods for the life of the dog. There is nothing in a growth food that an adult can’t have and often the growth foods are better quality at the same price. Growth and All Life Stages are the same thing. If a food meets the requirements for Growth, the company can choose to have it labeled for All Life Stages.
I would not use a food just because the same guy that formulated another food, formulated it. Make sure it has less than 3.5gm of calcium per 1000kcal.
Have fun with your pup! I love GSDs.
