A chicken or chickens should be given worm medicine at least once per year or every 6 months to prevent them from getting worms.
However you can also give them some garlic and apple cider vinegar that has the mother in the apple cider vinegar which is a natural remedy for getting rid of worms in your chickens.
You can add some apple cider vinegar and some cut up garlic to the chickens water at least once per month and that will keep the chickens worm free without the need for worm medicine.
When chickens have worms the common symptoms of a chicken with worms are bloody diarrhea, sudden weight loss or the chicken not gaining weight, puffing while sitting, the chickens may become less active, the chickens may also have pale and or dry combs and the chicken may also stop laying eggs.
If your chicken has worms they need some worm medicine or you can use apple cider vinegar, garlic or even regular vinegar.
It's best however to use worm medicine for your chicken to ensure the worms go away.
Apple Cider Vinegar can kill worms in chickens.
Apple Cider Vinegar is a natural and pretty old home remedy for getting rid of worms in chickens.
To use apple cider vinegar to get rid of worms in chickens just add a small amount of apple cider vinegar into the chickens water.
The chickens will drink the water with the apple cider vinegar and when the apple cider vinegar enters the chickens gut the worms will start evacuating out of the chicken.
Whether they die or not they will come out of the chicken because the worms do not like apple cider vinegar or regular vinegar.
You can also cut garlic up in small pieces and add it to the chickens water as well and the garlic when consumed by the chicken will cause the worms to come out of the chicken.
Alternatively you can use worm medicine for your chicken which you can easily get either online or at most pet or farm stores.