He doesn’t need to switch to adult food. Personally I feed puppy food to all ages. Adding a multi-strain probiotic and digestive enzymes will help him to digest better even though the food has them in it already. Sometimes they lose their potency with the kibble making process. And kibble is just hard and dry and can take several hours to break down and the dog digestive system is fast so dense kibble sometimes doesn’t get broken down enough. And the undigested protein makes powerful gas! My pup used to have terrible gas too. After being on probiotics for a while he should get more efficient with digestion. I’d give the supplement with each meal for several weeks and see how he does. My group only gets supplements once or twice a week and only if they eat kibble.
