Well, your thread title is a real attention-getter! I don't think you can do anything but keep him/her away from the chicken poop. Are they your chickens? If you know what the chickens are eating, then you can check if there is anything in their poop that could be harmful to your dog. Most dogs love to eat cat poop because of the undigested food that's in it. I believe it is normal for dogs to eat grass at one time or another. Some people think it supplements their diet, but others say it helps them throw up if they have an upset stomach. Just stay away from grass that has been treated with chemicals like weed killer or fertilizer, and you should be fine.