I've never had a gingivitis problem with any of my cats, thank goodness! But, Ming does have a weight problem, he is a big, big, cat. For a Siamese, he's huge! He tips the scales betwen 18- 20 lbs. Now, I have to leave food out all day because Mac has always been a cat who is hard to keep weight on. On a good day he tips the scales at 7 lbs. The vet wants both cats on food for urinary tract balance, which is fine, but she wants him to free feed, he is that hard to keep weight on. This is fine for Mac, but Ming also gets to the food, which he doesn't need. Plus, Ming is on amitriptyline, which seems to put weight on him also. Mac has bones showing now, so I can't cut stop free feeding. My vet says since Mac is getting into his senior years, it is more important to keep weight on him. Sometimes you just can't win! I hope everything works out for your babies, especially for Sky. After your experiences with Starr on pred, I'm sure you don't want to go there at all! I'm sending postive thoughts your way for all of your dear kitties. Keep the faith and give them kissies from me.