If your chickens have not been wormed in a long time, My Vet said it would not "hurt" them to be wormed even if they do not have worms(sure do not over do or think MORE wormer is Good)---sure with most wormers you have to discard the eggs for a couple weeks---that's one reason why I have several...
In my opinion your chickens are Wormy. They need to be wormed quick. In case they have tape worms too Wazine will not kill a tape worm so I worm mine with SafeGuard Goat wormer(prescribed by my Vet) at a rate of 2 1/2ml per quart mixed good in their drinking water--no other water---no...