You can also get a feline urinary acidifier with DL-Methionine (an amino acid) that's supposed to taste pretty good to cats - I think Drs. Foster & Smith carry it, among others. I'm lucky in that my Smudge is controlled on c/d kibble, which he really likes. (So does the little feral I'm about to trap - sie may be covered with fleas, but hir bladder will be nice and clean!)

Love, Columbine