This year I get to do a mid-town landscape upgrade for a couple who want chickens. There is a separate area fenced off from the main yard for the chicken coop and chicken run area and I intend to make this area just as lovely as the rest of the yard.
In my research I came across this great website, Nifty Homestead, they have a great list of plants healthy for chickens in addition to a list of plants that are dangerous to chickens. Some of the healthy plants listed are:
Most fruit trees
Some of the dangerous plants are:
Another good site is Backyard Chickens.
Photo from Family Food Garden