He's been behaving, eating well, using the litterbox and everything until the past couple days...
He began to pee on the couch - it's a second hand couch and I don't know if the previous owners had a cat, and just today he hasn't been eating much at all.
I don't know how old he is, and I haven't been able to take him to the vet yet. I had been corresponding with some people who wanted to adopt him but I haven't heard back from them. I don't know what to do with him, I've tried cleaning the couch with vinegar, hydrogen peroxide, dawn soap and baking soda like it says on a few websites but right now it's covered in trash bags and a few old towels.
The last time he are was around 9:30 this morning.