Originally Posted by MinnesotaNice
Do you worm as a precaution or just when you see the worms?
Since I've had the chickens on this land for 9 years, I try to worm once a year at least. I didn't need to worm at all the first 5 or 6 years. It usually takes a while on "new" land, meaning land that hasn't had chickens or other animals kept on it, for a worm overload to happen. If you totally free range, you are less likely to have worming issues. If your flock spends time in a run, where poop builds up over time, you are more likely to have a worm problem.
I've found an ill chicken can get overrun with worms faster than a healthy one.
Definitely worm when you see worms. Otherwise, if your hens are a good weight (you should be handling them frequently enough that you recognize weight issues), you are probably ok. They can look great, but when you pick them up you can find there is a lot of feathers and not so much flesh.
So, it depends on how old your flock is, how long chickens or goats or whatever have been on the land, and your chicken's general health.
If you butcher your own chickens, or can bring yourself to do a necropsy when one dies, it is a great opportunity to expore the digestive track and to look for all kinds of indicators of your flock's health. (Some worms can't be seen with a naked eye).