I use a 2 pinkie meal as the snake gets a bit older and he's not quite ready for a bigger pinky, but needs more than one to keep him happy. I feed new hatchlings every 4 days. If I go up to 2 pinkies, I might go every 5-6 days between feedings as it gets a bit older. It's really a judgement call on your particular snake. I'm not sure there's one set-in-stone type of schedule.