Please help! We simply don't know what to do... cat peeing all over house

[gtexan]

In order to give the full background, this is a bit of a long story. Apologies in advance!

I have a female cat, about 6 years old, siamese mix. She's not very intelligent, but she had always been very healthy and very friendly. She had the occassional Urinary Tract Infection, but a switch to urinary tract health formula food cleared that up.

About a year ago, she was having trouble peeing and after a day or two, she had a little blood in her urine. We of course took her to the vet and they diagnosed her as having a urinary tract infection. After receiving IV fluids, switching to a prescription food, and a long course of antibiotics, her problem resolved but then, despite remaining on the treatment paradigm, came back.

Throughout this treatment, she began using the litterbox less consistently. Perhaps because of pain associated with urination, we think she may have begun to associate the litterbox with an unpleasant feeling. We would find tiny amounts of pinkish urine in the corners of the house, behind the sofa, etc.

After having the problem return, we took her to another series of vet visits. After spending a lot of money, time, and general discomfort on everyone's part (particularly the poor cat who hates the vet!) we were told that she has mild, recurrent, chronic bladder infections that are brought on by stress.

A major issue here is that the vet said "stress" could be anything - even something as minor as moving furniture around.

We give her special food, and whenever we notice that she seems to be straining, we up her liquid intake (by mixing with food) and give her some urinary health meds.

Here's the issue: Despite resolving most of her health issues, she has continued to avoid the litterbox. She uses it most of the time, but not always. As anyone with a cat know, their pee is horrific. It smells very badly, is very strong, and is an incredible challenge to get out of clothes, furniture, etc.

Over the past months, she has peed on the couch, the dogs beds, our bed, my sons toy bin, any clothes which happen to be on the floor, the list goes on and on. Anything that's loose that she can stand on or anything that is roughly "litterbox" size that happens to be on the floor is a risk.

We are doing our best to monitor the situation, but with other pets to care for, a 2 year old child, and jobs, we can't watch her 24/7 and so we spend a lot of time trying to clean up her mess. The amount of time I've spent crawling on the floor sniffing areas to try and find the spot is embarrassing to admit.

So... HELP! What do we do here? She uses the litterbox - just not consistently. I used to think it was from associated pain, but now I think she may just be lazy or a lack of intelligence. I've seen her slowly wake up from a nap on the couch, stand up, walk to the corner, and just relieve herself right there.

I feel like we are completely lost on what to do. I feel bad saying this, but we're having a difficult time even enjoying her as a pet because her urination has become such a problem. My 2 year old even smells his toys to see if they've been peed on. It has permeated our entire life.

Has anyone ever had a problem where a cat stopped using the litterbox regularly? Not 100%, just not regularly? What can we do?