To be honest if they are trying to get to the turkey feed, then they are most likely hungry. I would hang a feeder with the layer feed for them. Fill it up (I use a 12lb feeder-small flock) with layer feed and leave it all day. They generally will not overeat unless they are meat birds as stated above. Layer feed is designed for balanced nutrition and the oats, scraps, etc. are extras or treats. They are trying to eat the turkey feed so they have a full crop at night. This helps with their rest and also digesting will produce a bit extra body heat during rest.
To get them outside for a bit, if you have some extra hay or straw, spread some outside on the snow so they can get their footing. You may want to toss out a few of their oats, to entice them out on to the hay. Getting outside even for a short while in natural light will most likely help with them being grumpy.