That's terrible! ... We used to have two cats that for some reason didn't feel like using the litter box, and would crap EVERYWHERE... anyway we put new carpet in (carpet being their favorite thing to poop and pee on) and they just kept doing it, unfortunately we were selling our house, and this HAD to stop. The good thing is that we didn't have them declawed, and they were both very avid hunters so we found a home (the boarding stable we rode our horses at) and "donated them," as they were in need of mousers that were fixed (which they were) and they are now both happily living in relative luxury, catching mice, and sneaking treats from riders.
Anyway, that's a terrible thing to happen! ... I have a horse, and we couldn't keep him in Ontario any longer due to the weather (he has really bad heaves, aka copd for horses) and his breathing was being affected by the hot and very humid summers we have, so when my riding instructor (family friend too) moved out west to Sask. he went with her and lived on her farm, now she's moved to Alberta and he's moved with her again. I miss having horses, so I'll be alleviating some of the hurt in the horse industry
Funnily enough though... I've noticed a big downturn in profit from auctions here, not so much private sale as riding schools are constantly popping up and are constantly in need of ponies and horses (more ponies).
Lucky for me, we are able after finding out my dad's business's incoperated stuff doesn't say what it does and what can be covered, so we are now searching for a pony to train and sell on locally as a semi-longterm project, and what it has to do with his business is that we can now claim all feed, vet, training, equipment, etc.
I wonder what they thought when they were abandonning their horse, "oh shh spanky the horse... no one will hear you" except its a bloody great horse!