NEEM OIL
neem is an all natural extract from a tree in (I believe) India. Neem oil is toxic to all types of bugs including ticks, fleas, mites, lice, mosquitos, you name it! I used neem oil on my chickens and it killed 99% of all live lice they caught from the city pigeons here in Providence, RI.
I seriously love neem. It has so many applications. I use it as mosquito repellant & it keeps off black flies too.
Mix neem oil & mineral oil together and rub right into chickens' skin. It is non toxic to chickens.
Neem can also be used on cats, dogs, and diluted into water in a spray bottle to spray down chicken coop, bedding, the carpets in your house to get rid of fleas, and more!
I also use it in my gardens to keep lily bugs off of my lilies. but be careful because neem kills all bugs bees and ladybugs and other good bugs too. so don't overdo it