My apologies for the use of grain when I should have said wheat and also added that my research focused specifically on Weimaraners -though appears to have application to other breeds as well.
Hi Carol, I found the following article by a vet that talks about the role that food has in digestive problems and allergy symptoms (i.e. itchy skin) perhaps it might shed more light on some of the issues your dog has with some but not all grains etc.
http://dogtorj.tripod.com/id32.htmlI think the article overreaches in some bits but he made some really valid points about sourcing for wild animals like, where would a wild dog get human raised grains?
Also for anyone interested, I found this site particularly useful:
http://www.dogfoodanalysis.com/dog_food_reviews/index.php/cat/1