Ground flax seed from Murry McMurray seems to keep mine healthy and it's not poison. There is my two cents worth after two years of healthy chicks. ;-)
Nice. I found this for myself: ( I'm constantly piddling about with my chickens & cats in the garden & dirt )
First, you will eat about a handful of raw pumpkin seeds. Try to eat at least 15 pumpkin seeds. Right after that you will take a teaspoon of powdered flax seed or ground flax seed that has been ground up into a powder with a coffee grinder and mix it into a glass of water or juice. Only mix flax seed into something cold. Never mix flax seed with something that is hot. Why, because it expends very quickly and you may not want to drink it after that. Now, as soon as you mix the flax seed into the glass of water or juice, drink it. Make sure you drink it all. That's it!
Now, let me tell you how it will work. Pumpkin seeds and flax seeds are two natural ingredients and are both very healthy for you. The pumpkin seeds will temporarily paralyze the parasite. And, the flax seed is a natural laxative that will expel the paralyzed parasite. You need both of them for this to work. So, take a small dose of this for two weeks once a day and, you should be feeling much better. Also, don't forget to drink lots of water during the day so that you can expel the parasites.
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I'm seeing pumpkin and squash seed in the worming threads too, so it makes sense. I'll try it first, though I'm almost sure I don't have worms too it'll be a relief to do something just in case.

I'll start feeding a few pumpkin seeds and some flax powder to the animals too.
Thanks!