My ladies seem to be doing just fine, but I am reading things here and there about how I need to worm them periodically and treat them for lice and other external parasites. How often do I worm them? I found wormer at the local feed store, but the bottle doesn't say how often to treat them. And they didn't have anything to treat for external parasites. I don't even know if they have any! I have 12 babies that are about 3 months old and then two more mature hens that are laying. I have had the mature hens for almost a year and feel terrible that I haven't wormed them or treated them out of ignorance! And I do love them so! Any advice? Especially with winter coming on I want to make sure they go into the cold season as healthy as possible. Thanks!