HI DG! Here's my thoughts: If you have hawk issues, you definitely need to get your run covered.
I had electric poultry net (still have it, but it's now moth balled) and absolutely loved it b/c I could move their range fairly often to allow the grass to recover. But, they would fly out. Then the hawks moved in. I've had heavy hawk predation for 2 years now, so had to come up with a plan B. I built a 6' tall run around 3 sides of the coop, giving them 500 s.f. The run can fairly easily be covered with bird netting, but that can't be left up in the winter. The least bit of snow or ice will tear it down. Eventually, I hope to have it covered with more secure fencing. If you re-build your run, it's a good idea to have the fencing high enough that you can walk in the run, and configure it so that standard bird netting sizes will work for you. (most comes in 14' wide lengths). I expect I will eventually place my electronet around the orchard, with the configuration to allow me to put the bird netting over it.
I grow sprouts for my birds in the winter. Very easy to do. It also breaks the monotony for a garden addict. It lets me play with seeds and water, and watch things grow! I also grow some sprouts for myself, though have yet to do so this winter. They get about 2 qt. of sprouts/week, though I could easily give them a qt./day.
You can put a grow frame in your run, and that would give them access to grass, if you have it covered with fencing so they can't dig it up. I would plant a mixture of grasses and clover. I prefer to turn my run into a DL compost. Goal is to have about 6" or more of compost covering the whole run. This draws beneficial insects, as well as giving them access to beneficial bacteria, fungi, and What ever other goodies they find in there. Grass clippings, leaves, garden and kitchen debris, wood chips, litter from the coop (I use leaves in winter, and add grass clippings in the summer for coop bedding), and any other compostable material I can get my hands on.