The only thing I use and it gets rid of everything is frontline spray. Only use the stuff for puppy's and kittens though. Put on tiny spray on the back of the neck, one under each wing, and one above the vent (not on the vent) In two days...no more of any bugs on ur chicken
If you hang this in the chicken house it keeps the mites away.....works great and you don't have to put chemicals on the birds. Large areas need more than one.