Had the same issue, as the op, loads of turds when the dog, Brian, below was on Bakers however moved him onto Skinners, which has improved the situation, his coat looks better and has a more relaxed nature to him, not hyper any more. Also he now eats less due to the food being better quality and therefore less turds. When on bakers he wasn't interested in food an now he eats his meals in one sitting.
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PS I think working dog food is VAT free..