About a week ago I noticed my hens had lost a lot of weight. So I added 2oz of Wazine-17 to 2 gallons of water and left it in their waterer for a day and a half. It's been over a week and their combs are still pale and I noticed that they're doing this weird gaping thing with their mouths. Even our dead quiet Light Brahma has started making noise. Is one day of wormer enough or should I follow up with something?