--------------------------------------DMRick said:What did the vet do? Blood work, check for stones, take a urine sample to make sure there isn't any blood, or rule out diabetes? If the cat has had a problem, and it hurt to pee in the litter pan, they associate that, and so they often will pee elsewhere. Changes in the house (even having someone new come and live with them can confuse and change their habitsas well as confusion in the house, such as when you were all packing to move), furniture moved around, a change of litter (and even though I use one brand of litter, I had a cat that suddenly wouldn't use it..(luckily, she just pee'd next to the box, and not all over the house)..I didn't realize the company changed it, until I called and asked them..it looked the same) can all have a part. Is the cat drinking a lot, or not enough? Has the water changed? Is he on only dry food, and has wet food been tried? Has the cat been confined to one room for a week, with lots of visits from the family to break the cycle, while the smell is taken care of..and covered, so he can't get to the same spot?
A touch type physical will seldom find anything..you usually need more invasive tests to see if it's a medical problem. If the vet rules those things out, then a sedative might be in order.
Everything you suggested has been done - and more.. Even the crystalized testing.. Initially we thought it might have something to do with the moving and packing too, but then my son-in-law recalled times that Taz had done this months before they were even considering a move..
Taz drinks a normal amount of water - but has never been able to eat wet cat food or he'll vomit it back up as soon as he eats it.. (Been that way since they first got him as a kitten..) He still eats the same food - is very finicky about that and won't eat anything else.. Still uses the same kitty litter - but he uses it when he "wants" to throughtout the course of the day and night.. When he doesn't want to, he pees elsewhere..
About the only room in this house that he could be confined to would be the bathroom - and then he would just yowl non-stop at the top of his lungs..
When SIL's cousin drops by she always has her bag of medical goodies with her because she has to travel to Saratoga to treat horses that are farmed there, so it's never just a touch-type exam.. If anything needs to go back to the lab for further testing she just takes it back with her.. Of course DD has also taken him to the regular vet quite a few times when SIL's cousin isn't available or is out of town, but the tests never reveal any problems..
It's very frustrating - to say the least.. If push comes to shove, I guess they'll have to try the sedatives from the vet..

as well as confusion in the house, such as when you were all packing to move), furniture moved around, a change of litter (and even though I use one brand of litter, I had a cat that suddenly wouldn't use it..(luckily, she just pee'd next to the box, and not all over the house)..I didn't realize the company changed it, until I called and asked them..it looked the same) can all have a part. Is the cat drinking a lot, or not enough? Has the water changed? Is he on only dry food, and has wet food been tried? Has the cat been confined to one room for a week, with lots of visits from the family to break the cycle, while the smell is taken care of..and covered, so he can't get to the same spot?