sorry hun, speed reading again!
Frontline works a treat on chickens for all things crawling, but its not licenced for them so beware
(i use it on mine) You wont over dose them using frontline and flubenvet together or close together-dont worry. seriously though, take that stuff back...if he gets funny say he sold you a product thats not licensed for chucks and your gonna report him
...dont take rubbish, there are too many people trying to make a quick buck from novices...dont take it!