I changed my cats' food from Fancy Feast and Purina One to Wellness and Blue Wilderness. Ming, my Siamese boy, had recurring urinary tract blockages and I have him on amitryptiline. Mac, my orangey, is just getting older and was starting to lose weight and vomit more than usual. Someone on here recommended upgrading my cats' food from FF to something healthier. Well, once on these foods (and I tried several before settling on these two, which both will eat), Mac started putting on weight and no longer vomits, or very rarely, and Ming is doing so well I have reduced his med levels and he is doing well. I highly recommend upgrading Cassie's food. My boys are playing like kittens again and they have a gleam in their eyes I haven't seen in years. These foods cost a bit more, but they are more than worth it!