Hi Kari-
I disagree that a puppy and 5 year old dog can’t eat the same food. You can absolutely feed the same food to both you would just maybe not feed the same amounts. Idk if you consider your dog a senior dog at 5, but if you do senior dogs need MORE protein than puppies and adult dogs contrary to popular belief. Senior diets are often very very low in protein however, a puppy food wouldn’t be. I never care about what the front of a bag says. My pitbull is currently eating a food marketed for “small breeds” lol. its just smaller kibble size and hes fine with it. I would have no problem feeding him puppy, adult or senior food as long as the ingredients were up to par for me and the nutrient profile was correct.
Take a look at the list Dori linked. Those are all foods that have proper calcium levels for large breed puppies like your golden doodle. and please make sure you don’t overfeed as that, along with improper calcium/phos levels can cause many skeletal disorders like pano, OCD and hip dysplasia.
