I have had great luck with the NuVET Plus daily supplement and also Avoderm Dog food. WE are using the lamb Avoderm food for our seniors and allergy prone pooches..
Avoderm is easy to digest and high quality, See here http://amzn.to/2nmXqY6
NuVET Skin-Coat and Allergy supplement for dogs, see here http://www.nuvet.com/81098 ( Give 1 per day long term as it will strengthen the immune system and help fight off allergens ) If you use order code 81098 they give a 60-day money back guarantee and 15 % off the auto ship program. we get ours every 90 days on auto ship.
