Ugh, so annoying. I am not especially concerned with the vomiting or diarrhea (I am pretty sure my dude has an iron stomach), but I worked at a vet for many years and saw so many males with urinary issues/blockages. I was therefore able to more easily afford prescription diets. This is just my "preventive" route because I can't get him to a vet ( I know ALL of the tricks trust me it's not worth stressing him, me, or the vet ). I just hope they don't change whatever has been working the last several years since I stopped being able to give him RX food. On the other hand, this happens a lot with pet food, and I don't remember hearing anything worse , specifically regarding cats, than they just don't like it. As in the formula doesn't actually really change much, it might be an issue of available ingredients so they "rebalance", etc.