Hi, I have the Ivermectin Pour on for cattle 5mg per ml. I see info on here about doing drops on the back of the neck but I saw a video of a lady brushing it on the neck, under each wing and around the vent. She mixed 1 part Ivermectin to 2 parts water and used that solution. Which way should I go with this? Some of my girls have lice pretty bad right now and I need to get on top of this. I'm cleaning out the coop at the same time. Do I use the Ivermectin to clean? A friend of mine said she sprayed her coop down with a diluted solution. What do I do?