I'm switching my pit and pit mix to the same food. Remy, the pit mix, is on SD puppy from the shelter and Tank, pit, is on Purina Pro Plan. We have tried chicken soup for the puppy lover's soul and Tank did good, stools were a little loose but nothing major, Remy, on the other hand, had severe diarrhea. I want to put them on TOTW High Prairie, however I'm not sure if I should use the puppy or adult, Remy is 4 months and Tank is 3 months, puppy has 28% protein and 17% fat where the adult has 32% protein and 18% fat. But I've heard hat TOTW is an all life stages food, and to feed the adult one instead of the puppy Any opinions on this will be very helpful

Also if I feed the adult formula how much would I give them and how many times a day? As the adult bag says 3/4 -1 1/2 cup for 10-20lbs and 1 1/2- 2 cups for 20-30lbs, and puppy says 2-3 cups for 10-20lbs 3-4 months of age and 3-4 cups for 20-30lbs 3-4months of age.
Any help and opinions are appreciated!
And believe or not Remy is actually bigger then Tank Lol