My 6 week old girls are outdoors now in their pen/coop and they are eating about 1/3 to 1/4 of the food that they were eating when they were in the brooder box. They're still on chick feed, but are eating at lots of grass, tree debris and bugs/worms, etc. Is this normal? I am only having to fill up their feeder every 3-4 days and it was DAILY when they were in the brooder, but I think they were scratching a lot of it out then. They are scratching A LOT out in our yard and seem really happy discovering all that the outdoors has to offer. Is this normal? They are growing like crazy and getting fat, so that is a good sign. I just need reassurance. New to this chicken thing, y'all.