Yesterday we purchased 20 cans of Mittens Cat Food upon the recommendation of other cat owners. I should have known better than to have not checked the ingredients and yesterday all three cats became violently ill on the Tuna flavor and this morning we tried a different flavor and all got sick again including our kitten! This food is made with meat or poultry by-products and obviously less than healthy other ingredients. I believe that the handling of these cans has as much to do with the problem as the product itself. Transportation or storage in hot warehouses can cause spoilage and I am looking into this potential as well, it for now, I am angry and have written to Pet Supplies Plus And hope to receive other than an automated reply.