wvvet......excellent point! There would be a specific cause as you stated. Two of the dogs I was speaking of were fed a chicken based protien food prior to changing over to the beef based " Black Gold" performance blend. The others...I can' t say. All of these dogs had their " conditions" simply go away and not come back after making a food change. Guess they got lucky with their new selection by elliminating the source of the problem.

Thanks for the response wvvet,

Rick