Should sunflower seeds be only used as a treat or is it ok to put them in with the regular food? Also, should I make sure that the feeder is always full or should I let them go for a day without a endless supply of food? I put a chicken scratch and layer blend in the feeder pretty much everyday. Too much? I feel like they eat way too much, but they seem happy. I have 5 hens all assorted breeds and they are about 5-6 months old. Thank you for any thoughts on this matter.