I have been purchasing almost all varieties of Wellness canned cat food in the 3 oz cans in bulk from Amazon for several years now (we're talking close to $200 worth of food at a time).  My cats have always loved this food, been very healthy and active, especially for 11-year old cats, and I've never had any problems.  Unfortunately, this latest batch I purchased back in November all begin with 7W, just as other reviews have mentioned, and my cats sniff it, walk away, and come over to me begging for a different food.  Well, I'm HAPPY they weren't eating it, for the most part anyway, because the few times they nibbled at it, they ended up either throwing up or having diarrhea.  Now, my cats have long hair and are prone to hairballs, so I figured they both were working on a hairball, leading them to eat less and become lethargic (this does happen every once in a while, and then I give them some hairball remedy goop that often upsets their tummies but helps them eliminate the hairball); however, I switched to Purina One wet food for a bit, and suddenly they were back to their old lively selves.  Tonight I tried the Wellness again, and the cats practically ran to get away from their bowls.  There is obviously something wrong with this newest batch of food I ordered.  Oddly, to me anyway, it doesn't smell so bad and seems normal enough for a pate, albeit somewhat dry compared to the older stuff, but I'm going to trust my cats on this one.  I don't know what the issue is, but I DO know that I won't be purchasing this food ever again and am permanently switching to Purina One - grains, by-products and all.  Hey, at least chicken legs and beak won't make my cat sick like this supposedly "healthy" food!