I have a flock of 15 hens, all around 6 months old. They were given chick feed until about the end of October when a few started laying. I switched to layer crumbles, and they all ate normally. The weather has changed drastically (below freezing), so I added some scratch and BOSS (which I normally only give as a treat). I have tossed both of those out in the run so they have something to work on during the day. I change their water often so it isn't frozen, and they are drinking but the layer crumbles level hasn't gone down in 2 days. I supplement them with fresh greens (cabbage, left-over veggies & fruit) which they eat right up, but I do not give them very much at one time. I'm concerned that they aren't getting enough to eat though since the crumbles are not getting eaten. Should I change it again? Any advice is very VERY welcome. Thanks in advance!