If you think he’s going to be over 55-60 lbs as an adult then he needs to stay on a large breed puppy food for at least a year and a half. Also avoid neutering him until then as well if he isn’t already neutered. I also recommend Fromm large breed puppy or wellness core puppy. Both are formulated correctly for large breed growth. However. I’ve heard the 4health is good for sensitive stomachs. I would try a large breed puppy food first (make sure it has the proper calcium to phos ratios though not all large breed puppy foods do) then if for whatever reason he’s showing to have a sensitive stomach I would then try the 4health. Also have you been to the vet for the scratching? I would do that first just to rule out any health issues and make sure it’s not environmental allergies.
