I bought 2 new cardboard scratchers yesterday to replace some worn ones. I put them out, and as usual Freckles was the 1st one to use it. A few minutes later there was a tussle by one of the scratchers. Freckles was on it and was ambushed by Bob. I didn't think anything of it. When I went by it a few minutes later I noticed a pee stain (most likely from Freckles) and that Bob was sniffing that spot this morning. Is this normal? Freckles is my submissive cat and I've never had a spraying problem with either. They're both neutered, so that's not the issue.