Hello mudkitty...
...your kits are beautiful!
Please read the following link sent to me about FLUTD. Just keep in mind UTI's are rarely true infections (less than 2%) but a vet visit is always warranted when you suspect trouble. Once the appropriate testing is done, there are a number of treatments available if necessary including the biggest culprit of all... stress management.
http://www.veterinarypartner.com/Content.plx?A=612As for getting rid of urine stains, any anti-bacterial enzymatic cleaner will do the trick. I live in the US and use SimpleSolution. It's economical, the fragrance is fresh, and you can find it in any mainstream pet supply store.
http://www.simplesolution.com/products/ ... tions.htmlWishing you good luck from my "pride" to yours.