So here's the deal. . .

All three of my Ball Pythons are over 300 Grams and one adult mice(about 20 grams) each is no longer enough. I don't want to have to feed them multiple mice so I'm about to order some rats from rodentpro, but I was just wondering how hard it would be to switch them over to rats?

Would be better to get the xl mice and keep feeding them mice for a little while longer until they put on more weight? I'm just pretty sure they'll refuse to eat for a while.