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The bags are 50 lbs bags. In one pen I have about around 15 chickens and I have two 30 lbs feeders. They will clean then out in about a weekend. Plus my other two pens. They haven't been wormed in a while. Would this cause them to stop laying. Nothing has changed, still same pens and haven;t introduced new birds.
That is WAYYYYYY too much feed to go through for that amount of chickens. You have something else massively wrong in your flock. Parasites can cause this as they need to consume more feed to maintain their weight. And yes, if their body stores get too low due to worms, they can stop laying altogether and possibly die if the worm load gets too great.
I'd worm them immediately - use Valbazen, it will kill all types of worms. If they have tapeworms, it gets a little trickier, can require an extra treatment. Here's a great thread on valbazen:
https://www.backyardchickens.com/forum/viewtopic.php?id=420520
For my 24 chickens, 50 lbs lasts at least a month, if not a bit more.
Thanks for all your help. I there any signs of worms. They seem the same. But after you mention it here in the past few months all ot seems they do is stand around the feeders and eat. Once I pour feed in the feeder they attack the feeders like they are starving. Even of they have some in the bottom of the feeder and I just top it off they still act like they are starving.
Would any medicine work just incase my local feed store doesn't have that kind.