Hubby got down and looked tonight and said there is a place where the duct work connects and it's possible the urine got between that and soaked into the insulation wrapped around the duct work. He said he would crawl under the house and replace that insulation since it looks like I've cleaned everything else squeaky clean.

QSL- I thought about baking soda too but wasn't sure if it was good idea. Dummy me didn't think about vacuuming it out, LOL. I will try that tomorrow, thanks.

Poor Disney, she has been going down hill quickly. It seems like this past month has been the worse. We even had "that" talk about her this past weekend. Hubby wants to make sure I'm prepared for what is coming.