Join Date: Jun 2008
Location: northern Minnesota
Re: Cat not urinating or eating
All three of the major urinary issues - crystals, infection, and interstitial (idiopathic) cystitis can cause bloody urine. Only your vet can determine which issue(s) are at work and the appropriate course of treatment. My boy, Phantom, has had both a complete urinary blockage and a bout of cystitis (years apart), and in both instances his urine looked like almost pure blood.
Water is definitely the most important and helpful management tool for crystals. The more the cat drinks and urinates, the more crystals get flushed from his system before they have a chance to clump together and form blockages; It's also very important to keep the litterbox immaculately clean so that you don't give the cat any reason to want to "hold" his urine to avoid using the box. Anything that causes urine retention gives crystals time to clump together. If Yoda is developing crystals, it's important to know which type of crystals he has because they develop in different pH environments. If your vet recommends a diet change, you need to make sure the new food adjusts his urinary pH in the right direction for the crystals involved.
Interstitial cystitis often occurs in response to stress, so keeping the cat calm and happy are the best preventatives for this problem.
UTI is a bit tricky. I have read that extra water intake isn't the best solution for this problem because water dilutes the urine, making it less acidic. The less acidic the urine, the more friendly an environment it is for bacteria that can cause UTI. I don't know if this is really true, but it does seem logical to me.