Cat made the bed her potty

I have a female cat, she's 4 years old. Recently (within the last two weeks) she started urinating on the bed. I keep her litterbox very clean, so this was alarming to me. I took her to the vet, and they found nothing wrong. I cannot, for the life of me, get her to quit using the bed as a litterbox!! At least once a day, while we are out of the house, she climbs on the bed, and does her business. She did it this morning with me still laying in bed!! I moved her litterbox to a different location this morning, hoping maybe that will resolve the problem. If that doesn't fix it, I'm not sure WHAT to do. I live on a boat, so I don't even have a bedroom door I can close to keep her out of there! I looked into the "no pee" spray you can buy at the pet store, but that has a funky smell, and I don't know if I'm going to be able to tollerate sleeping on it.

I have noticed a change in attitude lately. I have another cat, who is 3. They used to get along GREAT, until I went and got the other cat fixed, like 1.5 months ago. Now the older cat isn't very nice to the younger one. Constantly hissing or whapping her on the head.

I don't know what to do. I love this cat dearly, but she's becoming a big problem. Anyone have any suggestions?!?! Thanks.

Well, she is telling you that she is upset about something that you have done or changed. They can't get us to understand their language, so they do the thing that they KNOW will get our attention and that we will not like. Think hard about what may have changed. Also, did you change the brand/type of litter you use?
The younger cat probably smells different to the older cat now so she is treating it like a different cat. I have had a few dogs that did not like neutered dogs (even tho they themselves were neutered).

Maybe she is mad you fixed the other cat.

You're going to need to use an enzymatic cleaner on your mattress to completely eliminate the urine odor, if you do not, she will continue to identify the scent with a good place to potty.
You may need to invest in a large dog crate and retrain her.

You should definitely look into getting some Feliway plugins.


Did the vet get a urine sample to test?