She is 4 years old now, and for the last two years (since we moved house) she has:
Pissed lavishly over a sofa, which we had to throw out
Shat in the hall regularly, on the bath mat regularly
Pissed on our bed, the kids' beds
Shat on the kitchen work surface.
For the last four or five months, she has been much better - we have had the odd turd on the bath mat, but nothing more than that, but over the past month or so, she has been shitting, regularly, on our bed. Where she and the other cat sleep. I am at the end of my tether with her. This is now almost a daily occurrence, and I am paying around £100+ per month to get the duvets cleaned. She is not (currently) peeing on the duvet, just shitting on it. (Not that that makes it better.)
We have a new sofa and I daren't let her in the sitting room unsupervised in case she ruins this one. I have had enough, but no idea what to do now. If I rehome her, she is likely to do the same at her new home, and end up back in rescue every few months as people get sick of living with cat shit and piss everywhere. But maybe she would be better if she could go outside?
She has been checked out by the vet, but not recently. She is on special urinary wet food, to help against cystitis, and special urinary dry food to counter stress. We have tried Feliway and she shits next to the diffuser. We have tried antidepressants, which just made her worse. We have two litter trays and have tried various types of litter.
She is a sweet little cat - not particularly affectionate, but has never scratched or bitten anyone. She is playful when it suits her, and entirely obsessed with food - she would eat all day long if she could, and is quite overweight.
I don't know what to do next, and I don't think the vet will either. I could confine her to the bathroom and litter tray while I am at work (she's an indoor cat). She and the other cat currently only have access to our bedroom, two bathrooms and the kitchen during the day. It seems unfair to restrict the other cat's access further. I have tried three litter trays and one didn't get used, so I got rid of it.
Does anyone have any ideas? We are only a short distance from Battersea, and I am so tempted just to take her there and say, please rehome her. I cannot take any more of this. I don't like giving up on animals, and I don't want her to spend her life going from home to home, in and out of rescue, as I think she would just get worse. She is a very pretty grey cat, so I think she would get rehomed quickly, but would then end up back being rehomed a week later. But I don't know what else to do.