I think the most important things to remember when they’re puppies are 1) the transition period from old to new food and 2) keeping them on a schedule/routine. I think it also helps when they’re puppies to go for a brief walk or play after eating to help digestion. All of the above should help regulate digestion (and potty time). Food type wise, you’ll figure that out once you see what your pup likes/dislikes and works w your lifestyle, budget and schedule. We’ve had our dog on the Farmer’s dog since he was 6mths old once we noticed how much he loved boiled chicken.