I'm probably going to order from American Rodent Supply. I've heard good things about them and their animals and the prices are very reasonable. Maybe I'll throw in 50 or so rat pinkies for the 06's also until they get a bit bigger. I've seen a few people mention that small rats are more than sufficient for even a full grown ball so I probably won't go any bigger than that. I don't want to gorge them and then have them go off feed.