If you've never wormed before, I recommend you use wazine 17. You can buy it at a feed store. Also buy an equine wormer called Safeguard. Dosage for wazine is one ounce per one gallon of water. Remove their water just before they go to bed at night. Early the next morning when they first go outside their house, give them the wazine water and leave it out for 24 hours. After 24 hours remove and dispose it, replace with regular fresh water. Throw eggs in the garbage for 2 weeks. Wazine gets rid of large roundworms only. Two weeks later you'll want to use a broad spectrum wormer like the Safeguard. Dosage is a "pea" size amount of paste for each chicken. It's easiest to put it on a small piece of bread and give a piece to each chicken. Again, discard the eggs for another 2 weeks. Your done with worming.