Is seven dust bad to use in my chicken coop? I have tried not to use chemicals but just can not get rid of the fleas...they are really bothering the chickens. I have been putting vasoline on the chickens daily to kill the fleas but they keep coming back with a vengence. Will the seven dust get into the eggs? Naturally the chickens peck the ground where I will be putting the seven. Will that be bad for us to eat the eggs? Please help.