I have 5 RIR pullets that are about 10 weeks old. I have been feeding them a combination starter/developer feed. They have always seemed to like the stuff. But, recently I've been giving them some left over fruits and vegtables from the kitchen. Now they dont seem to want to eat the feed. They have roughly 15sq ft of space in there run, lots of green grasses and bugs for them to eat, which they do. My question is this, can i undernourish my chickens by getting them full feeding them fruits and vegetables and not leaving them with an appatite for the feed?