I would imagine that different chemicals affect different dogs in different ways. And still we are back to genetics. My skinny boy is 25" and 63lbs. He looks skinny and barely eats dog food. I have taken him to the vet numerous times. He has no other signs of EPI or anything else other than being skinny. Stools look great, and nothing else is wrong. He's wormed naturally and chemically. Tried, emzymes, probiotics, Missing Link, cottage cheese.... I do know that he is sensitive to corn and gets the itchies bad if I feed it. No corn, no wheat, not by products for him. My big boy is an easy keeper. He could eat paper and thrive. He could eat food with corn and have not problem, but I feed both w/o corn because the one is sensitive, and I'm just not going to feed two different foods if I can. I've come to the conclusion, after vet visits, tests, wormers, antibiotics, satin balls, supplements, and a myriad of foods, this boy is skinny, just skinny, got the genetic short end of the stick, and will just be that way. Denise W. http://sabianshepherds.tripod.com for show and performance *join my site ring (link located on my web page)* ============================================================================ POST is Copyrighted 2008. All material remains the property of the original author and of GSD Communication, Inc. NO REPRODUCTIONS or FORWARDS of any kind are permitted without prior permission of the original author AND of the Showgsd-l Management. ALL RIGHTS RESERVED. ALL PERSONS ARE ON NOTICE THAT THE FORWARDING, REPRODUCTION OR USE IN ANY MANNER OF ANY MATERIAL WHICH APPEARS ON SHOWGSD-L WITHOUT THE EXPRESS PERMISSION OF ALL PARTIES TO THE POST AND THE LIST MANAGEMENT IS EXPRESSLY FORBIDDEN, AND IS A VIOLATION OF LAW. VIOLATORS OF THIS PROHIBITION WILL BE PROSECUTED. For assistance, please contact the List Management at admin@xxxxxxxxxxxx VISIT OUR WEBSITE - http://showgsd.org NATIONAL BLOG - http://gsdnational.blogspot.com/ ============================================================================