We feed raw with oats in it, but you have to find what works best for you dog.. grain or not. Find the one and stick with it as long s they like it and they thrive it is trail and error, but when you find the right one it is worth it.
Sounds like it might be staph infection…. Need strong round of antibiotics and you also need to strengthen his immune system….. Keifer, raw goats milk, sauerkraut, or Herbsmith microflora
as Tracey asked… can you post pictures! How old is your boy? What are you feeding.. brand and protein?