When I change him over (which I'm planning to do this weekend) would I still keep him on the 7 day feeding schedule he is currently on? And should I get a mouse just in case he doesn't take the rat?

He's already doing his "I'm starving to death, please feed me" windshield wiper dance. (He did the same thing last week about 2 days before he ate, then didn't do it afterwards and his husbandry is good, so I can only guess that is his way of saying "FEED ME, WOMAN")