My 5-week-old Golden Comets go through grit like crazy. I had been free feeding it in a dish next to the feeder, but now I've taken to filling the grit bowl just once every three days. They empty the bowl in a few hours! Technically they don't even need grit now, because I feed them exclusively starter feed. But many people told me that it's good to get them started on the grit habit early so they know it's edible. Any thoughts on this? Thanks!