I would get her tested for diabetes. My cat who was only about 8 started drinking and peeing a lot in and out of the litter box and he turned out to be diabetic. I would get her checked, just to rule it out.

Ditto that, ask them to do that first…Vet maybe shoulda picked that up (drinking more/peeing more always check for diabetes)…

They should have a litterbox for each cat PLUS one- so 3 cats- 4 litterboxes.  I would recommend that she try using a Feliway diffuser (also known as Comfort Zone)- it is a pheromone product that can help cats with inapprop urination.  This is a really tough issue to address and your friend has to be dedicated to try to make it work out- boxes should be scooped daily, unscented scoopable litter is recommended, Feliway diffuser in area where the cats are in (may need more than 1 per household- depends on set up) and replaced every 4-6 weeks.

It sounds as though the vet checked a urine sample and did not find any signs of an infection- blood, bacteria, etc and I am assuming there were no signs of diabetes either- urine not concentrated adequately or any glucose in the urine.  A standard urinalysis that includes a dip strip and sediment stain will indicate any of the above problems.

Comfort Zone link-

http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=13043

Here is a link for a litter additive that has been reported with some success in combination with Feliway.

http://www.preciouscat.com/attract-litter-additivebronly-available-through-your-p-7.html

This might be similiar or the same thing that she is already using per her vets recommendation.

It sounds as this is a behavorial problem- and unfortunately it is a difficult and heartbreaking process to work with- trust me, I know!  It won’t be cheap and easy to buy the Feliway, add a litter box, scoop daily and use a good unscented scoopable litter but that is her best shot.  Other than as a last alternative of trying the cat on prescription meds- which is not only costly- depending on the meds it is given 1-2 times daily- probably for life if it works.  Meds are definitely not an easy answer.

Your friend should also look closely at maybe why the cat avoids the litterbox- does it get ambushed by the other cats- is it in their territory?  Does it not like a hooded box?  I switched to dog litter boxes (about 3 times the size of a cat box) and that seemed to help.  Does the cat dislike a member of the family that is commonly in the litterbox area?

my cat started to pee every where and noticed that he was drinking a ton too. He is diabetic and was practically starving because of it. Now that we have the insulin he has stopped the peeing and excessive drinking

Have to agree on the diabetes – one of my cats (at my mom’s) was drinking a lot and peeing everywhere and it turned out to be diabetes. Took a few years but we were gradually able to control it through her diet and decrease her meds so that now she’s completely off the meds and stable.

About a year after she was diagnosed I was in the vet’s office and there was a woman who was looking very sad, she’d just found out her cat had diabetes and she’d decided that it wasn’t fair to make the cat “suffer” like that and that obviously the cat would have no quality of life and the only “humane” thing to do would be to put the cat down. I tried to tell her that listen my cat has diabetes and she’s living a fine life and is gettng better all the time but she wouldn’t hear it. Made me want to smack her.
– Annette

My cat Ash was diagnosed with diabetes and we treated him for almost a year, giving him special food, insulin shots twice a day and routine vet visits to test his glucose. Unfortunetly, no matter how many tests we did and how many times we adjusted his insulin he was declining and became very skinny and sickly. He started developing abcesses which we had to surgically remove and had an infection on his toe we couldn’t clear up. His body was just not responding to any treatments we tried.We spent thousands of dollars at the vet. It was breaking our heart, he was really unhappy and we were thinking about the big decision to put him down. Not long after though, he went into a diabetic coma and we made the decision to send him to the bridge. It was a very sad time because he was a great cat and was my boyfriends cat before we met. That was over a year ago and the house still seems empty without our “big guy”. The rabbits loved him too.

Despite my negative experience with feline diabetes I would still reccommend everyone give their diabetic diagnosed cat a chance at life. Some cats respond very well to treatment and can live full, normal lives.

Let us know how your friend’s cat makes out. Wishing them all the best!