I used to put a touch of vinegar in my Dobermans' water, but the cats are hard to get drinking it. so am starting slowly. Very slowly.
Long ago fur babies used to pee in the sink so I would see the blood in their urine, the only time they ever did such a thing. The poor dears were hurting and let me know, so off to the vet we would go, with angry and screaming beasties in the back seat!
Then I listened to the old vet and started putting a tiny touch of vinegar in their water, don't remember any more kidney infections. In fact, I use vinegar in salad dressings a lot.