Plant strips about 4 feet wide in areas with better quality forage the birds otherwise do not visit during the day. For shorter term benefits I suggest a mixture of timothy and legumes. Birds will tunnel into it during hottest part of day and anchor their foraging effort around it much better than if area does not have dense low cover. If longer-term effort to be investment, then consider brambles or even Buck Brush. The scatter some grains near those areas to prime their interest in exploring.
That would work if it was not all woods around the house and coop.
I do have forage crops planted behind the barn but that requires them to walk too far to go to. (clover, rye, wheat, rutabagas, and grasses) It was an attempt to persuade the guineas to chase bugs and grass hoppers somewhere besides the road ditches. They still prefer the ditches.