We had an outbreak of lice in the chickens this summer, after we came home from the Fair, and successfully got that under control. But I think there is still something going on with my flock. I have 6 Large fowl, and 5 bantums that should be laying -- I've been getting only ONE egg per day, most all summer. It's from the same girl. The six LF are all over a year, and all have layed well before. One is coming off being broody, but her chicks are 3 months old. Five of the bantums are 6 months old, and one is 10 months old. The older bantum did lay a few (no more than 4 or 5) eggs back in July (on the ground in the coop, never found the nest box). But then nothing. Feathers are a little dry on about half of the birds, and a couple are molting now, but in general, they've gone way too long not laying for there not to be something else going on. So, if it's worms, how would I know? And what is the treatment?