I started with 6 X's in March, lost one, not do to heart attack. For the first four weeks I fed them starter available all the time. From 4 weeks till killin time I feed them grower. I feed them in the morning and remove all food in the evening. I am growing them slower, they will get to the size but with a less chance of dying. My last ones I fed to about 15 weeks. Hope this helps.