Hi. My baby had and still has this issue. I also had a urinalysis done but her's came back negative. I picked up some crystals from her urine the other day and the vet is going to let me know for sure what type of crystals she had.
Did you vet say calcium oxalate or struvite crystals? For struvite crystlas, I heard that giving Naturvet cranberry supplement helps. For the calcium, I don't know much about that. The vet had said they were struvite for my baby, so I read up on those and asked questions on YT.
My baby didn't like the prescription food. I started giving her cooked chicken or ground beef, in plenty of water, to increase her water intake. She eats her regular kibble during the evenings. It seems to help. But every once in a while, I see the crystals again, usually when I add veggies to her diet, so that's out.
I hope your baby is doing well and that you get more informative responses.
