I'm so sorry that Luna keeps having UTI's. I sure hope that she'll start feeling better soon.

I was reading about some ways to help prevent UTI's in cats that you can do at home. Here are some of the things that you can do to help Luna:

1.Give her vitamin C and cranberry juice. The vitamin C acidifies the urine making it more difficult for the bacteria to grow as well as dissolving the more common type of crystal,struvite. The vitamin C dose is 250mg per 20lbs daily.

2. Feed her more canned food to increase her moisture intake. Depending on the type of crystal that the cat may have it's important to either acidify the urine (with stuvite) or to make the urine more alkaline (oxalate crystals). An easy way to acidify the urine is to raise the meat protein level. Making the urine more alkaline involves decreasing the protein level and adding a supplement, potassium citrate.

I got this information from the free e-book veterninary secrets revealed. It's free to download this booklet that tells you some of the basics. here's the link: Veterinary Secrets Revealed. You can also sign up for their newsletter which will tell you some more important information about our pets.