Thanks so much!!! As usual, great answers to any questions from you guys! I have never needed to open my Chicken Raising for Dummies book. I think I may just sell it.Pale combs and faces and gradual weight loss or a couple of signs or if you can see worms in the poop wich would mean an infestation. I use Wazine in the drinking water every 3-4 months followed by each a dose of Ivermec 12-14 days later, which is also good for external parasites also. But change it up every now and then. Wormazol Capsules for worms are easy to give but you gotta catch them all up individualy. I also give a table spoon of apple cider vinegar per gallon of water. for the first 7 days each month (just easy to remember when to do it) it lowers their ph level that parasites and bad bacteria cant thrive.