Quote Originally Posted by ashleycat
What if he doesn't go in that 10 min, and ends up going on the floor?

Or just when I see him looking for a spot, to rush him to the door?
Quite frankly, I don't think Charlie is potty trained. Go back to the basics. When you see him frantically sniffing around for a spot, rush him to the yard. When he goes to the bathroom, click if you want, and treat/praise profusely. NEVER allow him to go on the floor. I agree with Aspen and Misty. I know that Greyhounds, in particular, love a concrete schedule, but I would suppose almost all dogs do. Today, sit down and make a schedule. Try to stick with it until good behavior starts to surface.