What a wonderful idea. Honestly, I feel a little silly for not thinking of that myself. It really makes sense. I'll give that a try and hopefully resolve this issue for my old pup. They're like two grumpy old men sometimes.
So, a little history first. I have a neutered male cat, he's a rescue and around 12yrs old now. I adopted him 11yrs ago. He has a history of crystals in his urine which has caused blockage years ago, he's been on a special diet since then because of it and currently checks out fine at the vet...