Our vet recently told us that to keep out cat from getting a urinary tract infection that we should only feed his 3 ounces of food a day. 1 1/2 in the morning and 1 1/2 in the evening. He said the key is to only leave the food out for an hour. He said that what happens is when a cat eats, their PH balance goes up, therefore causing UTI's!! I haven't quite adjusted my cat's eating schedule as he is just used to eating at his leisure. If your cats are eating a lot then their PH balance is always high which would make sense that they are always getting UTI's! I hope this helps you and your kitties!!

M.Chilson