We have two cats - they are a male and female, neutered, and littermates. They have always gotten along well and still do. They are indoor cats only.
The problem is that they view any open box as a potential litterbox. This behavior started about a year ago when we moved from Texas to Colorado. We had to home them with a family member until we got settled, and then they cam to live with us again. Ever since then, we can't leave a box open anywhere. Cardboard boxes or plastic bins, filled with toys or tools or papers... if it's open and large enough to hold a cat, it's a toilet.
We haven't been able to catch them in the act, so I don't know if it's both of them or just one. They have two litterboxes which are cleaned daily and always accessible. They don't pee indiscriminately on furniture or the carpet - it's always in a box of some kind. And it's always pee, not fecal matter. We're planning to take them to a vet to check for UTI, but since they are selective about where they go and it wouldn't be much farther to go to their litterbox, I don't think that's the problem; I think they're doing it deliberately to mark territory.
Any thoughts on how we can get them to stop? We have a toddler and I'm concerned for his health; I don't want him taking toys they've peed on and putting them in his mouth. We are on the verge of returning them to a shelter, but this kind of behavior will virtually guarantee that they won't be re-adopted, so it may as well be a death sentence. If it comes down to protecting my child, though, I'll have to do it.
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