OTC "Hypoallergenic" Foods test positive for contaminants
Raditic, D. M. Remillard, R. L. Tater, K. C. ELISA testing for common food antigens in four dry dog foods used in dietary elimination trials. Journal of Animal Physiology and Animal Nutrition, 95:1
ELISA testing for common food antigens in four dry dog foods used in dietary elimination trials - Raditic - 2010 - Journal of Animal Physiology and Animal Nutrition - Wiley Online Library
This study evaluated four over the counter venison dry dog foods available from one on-line retail vendor for potential contamination with common known food allergens: soy, poultry or beef. An amplified, double sandwich type enzyme linked immunosorbent assay (ELISA) test of soy, poultry and beef proteins were performed by an independent accredited food laboratory. The ELISA test for poultry protein was found to be unreliable when testing in dry dog foods because false negatives occurred. ELISA testing of control diets for both soy and beef proteins performed as expected and could be useful in antigen testing in dry dog foods. Three of the four over the counter (OTC) venison canine dry foods with no soy products named in the ingredient list were ELISA positive for soy; additionally one OTC diet tested positive for beef protein with no beef products listed as an ingredient list. One OTC venison diet was not found to be positive for soy, poultry or beef proteins. However, none of the four OTC venison diets could be considered suitable for a diagnostic elimination trial as they all contained common pet food proteins, some of which were readily identifiable on the label and some that were only detected by ELISA. Therefore, if the four OTC venison products selected in this study are representative of OTC products in general, then the use of OTC venison dry dog foods should not be used during elimination trials in suspected food allergy patients.
I think it is important to note that several of the foods tested had other ingredients listed right there on the bag, so it's kind of the consumer's fault if they really thought the only protein source was venison. This article was of interest to me because I was using Natural Balance Bison LID and it tested positive for beef and soy. So much for that plan.