"my all black, very picky cat has loved this food for years. It serves to his picky taste and no dandruff on his jet black coat. But, recently the packaging changed and he started pulling his hair out, on the outside and inside of one of his legs. I called ProPlan to ask if the formula had changed and they assured me it hadn't, only the packaging. But, I compared the old packaging to the new packaging and the formula has changed, only 2 ingredients but none the less a change. I switched him to an all natural lamb based dry food and he has stopped pulling out his hair. If your cat eats this food and all the sudden is pulling or losing hair, it's probably because of the formula change."