Hi
I am very sorry for you loss of Bootsie, I know the love we have for our animals runs very deep.
I have heard negative things about household products such as the cleaning supplies we us. It's been on the news not of lately though in the past it was on a lot, that some can cause fatigue, cancers,etc..
It seems like the news makes these announcements then drops it and doesn't speak about it again.
You mentioned old paint the thing that comes to my mind is possible lead from the old paint. Another culprit can be mold which is toxic. I'm saying you have this in your home, it's possible, this was another story on one of the nightly news channels.
Maybe researching on line about toxic mold and household products might give you bit more information.
I am very sorry for your loss.
