sounds like your dog has environmental allergies and food usually is only 10% of the time - read up on this info
Search Results for allergies
shampoos i like are dr bronners unscented mild baby shampoo, earthbath hypoallergenic, true blue chamomille and green tea and blue hypoallergenic shampoo and conditioner.
no oatmeal shampoos - ironically these are not good for allergy dogs as oatmeal is a grain
use natural balance fish and sweet potato dog food and no treats for 12 weeks straight
start there and bath weekly as with environmental allergies you need to bath weekly to keep the pollens, etc off the hair and skin. Also tshirts work real well with allergy dogs as it keeps the allergents off
join
allerdog@yahoogroups.com as you will learn alot from that group as we have all been dealing with allergies for years. I have been dealing with it for 4 now and it is not fun