only thing we are working on right now is getting some weight on them they are between 4-6 months old and only weigh 84 grams empty so the recommendation is 1 hopper every 3 days for the next 8-10 weeks or until they reach 150-200 grams then back them back up to every 5 days on an appropriate sized prey until they reach 400-600 grams and then move to every 7 days