My Siamese gets urinary blockages and I would love it if he would eat any grain-free food or other healthy diets. I've tried Science Diet, Royal Canin, etc.... but the only urinary health dry he will eat is Purina One. But, it's been months since he's had any problems, so maybe the stuff works. What's equally important to me is the my orange guy will eat it also! I love not having to buy two different foods. They both love the Friskies Special Diet food for urinary health, as well.