That's so true. If we see a quarter laying on the floor, we scoop it up.
I went through the kitchen a while ago and there was a quarter on the floor. It must've fallen through the hole in my pocket. I have a pretty good hole in my pants pocket. I was at a store today and I felt the embarrassing escape of about a dollar and a half in chance going down my leg. I tried to pull the pants leg in a little to keep them from clanging against the floor and rolling off in a dozen directions. Fortunately I was successful.
After that I kept my change in my coat pocket. But somehow, at some point, I must've had a quarter in my pocket later. Because I went through the kitchen and there it was on a throw rug.
The dog was sitting there in the area, of course not paying any attention to the money. She'd probably sniffed it -- I don't know -- to see if it was edible. But that would be about it.
It made me think. They simply don't know, they simply don't care for money!