It would be best to leave him for one full week prior to offering him his first feed Lisa. The fuzzies are frozen are they? Since he's been on pinkies I would just offer the one fuzzy this week and see how he goes then perhaps you can work him up to two per week if he seems to need it. You don't want to make big jumps in prey volume too fast so going up in size and also total volume being so much more might be a problem for him. Best in my mind to do these things in stages. If you do decide to feed two prey items simply wait for the first one to be fully swallowed and the snake looking ready to strike again, then offer the next one (make sure the second one is as warm as the first, since when it sits around waiting for the first one to be eaten it can cool down significantly).