The best thing for you to do is to see what you feed him now (maybe let us know), and then do an elimination diet – I think it’s something like cooking a basic homemade chicken and rice diet and slowly adding other ingredients from the food he is currently on to see if he reacts to one or more of them. But some of the pros on here could maybe able to better explain how to do an elimination diet.
Some more common allergens are various grains, corn, sometimes chicken or another protein, sometimes peas or tomatoes (or tomato pomace), sometimes yeast. So doing an elimination will help you know what to avoid in a food and it will make it easier for us to know what to recommend.
As for skin/coat issues, fish oil and coconut oil do some miracles. Also fish-based foods and treats. For my dog who had the worst case the vet has seen of fleas and wounds and hair falling out when he was found and taken to a vet, The Honest Kitchen’s Beams (dried fish skins to be given as chews/treats) did some miracles and then a teaspoon of coconut oil every other day continually enhances this miracle and his skin is nice and healthy and his coat is as soft and shiny as ever, I love it. No trace of wounds or missing hair – he is double-coated and his coat is very thick, soft, shiny on top and healthy. 🙂 He is also on mostly a fish-based food now so that probably helps too.
But as for pet dander – sometimes the above measures may help, sometimes not – the dog may just be genetically predisposed to extra dander. But it’s worth a shot to see if you can help it some too.
