My flock of 50 has lice

[Eggcessive]

Most brands have directions on the inside label for spraying chickens and another for spraying the coop. My brand of Permethrin 10 uses 1/2 ounce (15 ml) per gallon of water. TSC sells pint and quarts which are inespensive and make many gallons.
It helps to do your own research to know how many times you need to treat, and how often. Lice hatch and reproduce every 10 days. You need to treat 2-3 times 10 days apart to get lice, the newly hatched eggs before they reproduce, and to get any that are missed. Your coop, nest boxes will need to be emptied of bedding, take it far away, then spray coop, roosts, and nests, before adding new bedding. Make sure that you are not seeing mites, which need treating every 7 days.
Here is some reading to help with this:
http://www.the-chicken-chick.com/poultry-lice-and-mites-identification/

https://anrcatalog.ucanr.edu/pdf/8162.pdf

 

[casportpony]

How much of the liquid should I mix with water in a spray bottle?

The directions are on the bottle of concentrate, but I think it will be something like 5 ml concentrate per quart of water. I will look it up if you want.

 

[casportpony]

I just checked, the Gordon's product is exactly 18.927 ml per gallon, so round up to 20 ml per gallon. Four quarts to a gallon, so 20 ml / 4 = 5 ml (one teaspoon) per quart.

This is the label

Here is the math:
8 ounces / 12.5 gallons = 0.64 ounces per gallon
0.64 ounces to ml = 18.9270589 ml

 

[Autmizak]

Thank you so much. I’m on my way to get it now because I just came home from school and my one chicken is like half dead and she is infested with the lice! Will this kill the eggs as well?

 

[casportpony]

Thank you so much. I’m on my way to get it now because I just came home from school and my one chicken is like half dead and she is infested with the lice! Will this kill the eggs as well?

I don't think it will kill the eggs. Use the dust on the sick one because getting her even a little wet might chill her enough to kill her. You should also place her in a room that's 80-85 degrees.

 

[cassie]

My method of getting rid of the lice was simple, low tech, and effective. I went to the livestock supply, bought a can of louse powder, and applied it to each chicken. I went in at night, grabbed them off the roost, held them upside down by the feet and powdered them well. I made sure I got it under the wings and I rubbed it into the feathers. I later sprayed the chicken house, particularly around the roosts, but I don't remember now what I used.