My pullets are 7--13 weeks old. They are not free-ranging. I have been weeding my yard and tossing the greens into their run. Today I noticed that they barely ate any grower feed. Do I need to worry that they aren't getting balanced nutrition because they prefer weeds or should I keep giving them fresh "salad" every day? I do not use any chemicals in my yard (which is why I have more weeds than grass in my lawn).