I live in Maryland and have a flock of 20-ish chickens and 3 ducks. I saw worms in one of their poops today, it appeared to be a round worm. I want to know what wormer is recommended. I have read some things already but all I can find is ones that are put into their water source. I am hoping there is an oral/transdermal wormer that can be given directly to the chickens, not one that goes into their water source. Any suggestions?