[artmidget]

I am so sorry!! Such a hard situation to be in.

One of my cats misses the box sometimes so I put a puppy potty training mat under the litter box... you could try placing these potty training mats in areas that your cat has accidents or likes to be... it may not solve anything but could at least be less messy. Also if he has ibs, maybe he doesn't have time to get to the box before he needs to go? Do you have more than one litter box placed in different locations?

Hope you re able to find a solution!