This might be silly, but I do want to ask just in case. Right now the set up for my guy is puppy pad under fleece. I was just changing his cage and the pee on the pad is very brown. I noticed that as well about a week ago when he peed on the puppy pad on my lap. I have only had him about two weeks so I'm unsure if this is normal or not. Took a quick picture for reference. Thoughts?