I second the Nut’s food recommendations.
I would also agree that anal gland issues can be related to food intolerance.
I have a two year old Golden with food intolerance issues. Flax is one of his problems. Recently I have him some treats, maybe one or two per day, just to see how much flax he could tolerate. After several days, I started to get the faint whiff of small gland and knew he had his fill.
Was the protein in your old food chicken? What about the new food? If you’re not feeding chicken now, try eliminating the chicken & rice that you prepare and see if that helps. Food intolerances are tricky to figure out. Mine can’t have fish in any form including fish oil, chickpeas, lentils, beans, garlic or flax. Any of those things could cause him to have strong smelling anal glands. So while the primary animal protein/s could be the problem, it could be something seemingly far more innocuous.
