dog illness

Old Roy 'is a dog food that causes the disease in dogs?
For the second time this year, my blue heeler dog is very ill. The analysis blood showed that both his pancreas and liver are the problem. A friend said her dog food ( "Old Roy", weight control) that is doing their disease and stop feeding immediately. Has anyone else heard of this problem? Also if you have any other suggestions to achieve and maintain my good healthy dog please let me know.
There has been a retreat in Old Roy, so it could well be the problem: http://www.rosas.rescuegroups.org/info/display?PageID=6508 My dogs I moved to Flint River Ranch when they had the melamine scare some years ago. They never had a memory http://www.flintriver.com/ProductInfo.asp
Distemper Dog