http://en.allexperts.com/q/Alternative-Medicine-Pets-3721/Cat-UTI-health-1.htm

Here's some things that will help your cat to stay healthy. Begin to
add Garlic powder to his food daily. Garlic is an anti-microbial and
will help eliminate bacteria and infection. Don't be afraid to
sprinkle it with a heavy hand, cats like Garlic and he should it it
right up. Keep him on this, it will not harm him and he will boost his
immune system and healing time by 70%.

Begin a regimen of Probiotics such as Acidolphilus. These good
bacteria are actually found in yogurt. You can purchase these in
capsule form at your pet store. Acidophilus helps to maintain and
strengthen the good bacteria of the gut crucial for healthy digestion.
Without these good bacteria human and animal bodies are prone to
disease and illness. When humans an animals are put on antibiotics,
they kill this good bacteria and render the body weakness and
acceptable to bacteria. This is why you may have heard woman complain
of getting a yeast infection after taking antibiotics. This is a great
supplement to add to his diet and again this will not harm him in any
way.

You may even add a tiny drop of vegetable oil to his food. This will
ensure good passage of fecal matter and will not allow bacteria to be
built up in the gut. Just a drop. It will also make his coat more
shiny and healthier in appearance.

You can also add a drop of unsweetened Cranberry juice to his food
daily. This juice must be purchased from the health food store because
it contains no sugar or other products. Cranberry acts the same in
humans and animals. It helps to strengthen, tone and cleanse the
kidneys. Human UTI clients take this daily to ward off infections and
bacteria in the bladder.

Here is one more alternative site that you might want to check out. I
must point out here that I have never personally used homeopathic
treatments for cats, preferring the conventional antibiotics that most
people use. I posted this from research on the Internet. I hope they
are of some help to you, but,*&** please talk to your vet before
commencing treatment, just to be sure***?

http://www.felinecrf.org/treatments.htm#UTIs
Good Luck,
Sheelagh >"o"<