I'm glad she is home and hope the tests are good. I'm another who can sympathize with the pee pee problem. Ripley has begun spraying again. So far he is only doing it in our bathroom in the corner by the tub and bath rug so it's not too destructive but I'm afraid he is going to or has already started spraying elsewhere and I just haven't found it. The odd thing is his urine has very little smell to it. The other cats can smell it but it's not strong like cat spray usually is.

I've never thought about the cat tree causing acne. Have you ever considered recovering it with new carpet? It's easy to do with two people and a staple gun and a lot cheaper than buying a new tree. You can get carpet remnants at flooring stores really cheap. I got a huge remnant for $10 a few years ago and we've used it to cover our tree and recover three scratching posts plus there is a lot left over.