A little rant on pine tar. It almost cost 4 of my birds their lives...... Had some picking problems when I tried to combine 3.5 month old Ameraucanas with full grown RIR and BRs. Tried again and took the time to smear the buts and entire hind quaters of 25 birds with pine tar after hearing the recommendation here. Watched them for a couple hours that night had my wife check on them in the morning, but when I got home in the afternoon 4 birds were picked clean on the tails, into the flesh where you could see the meat. I'm amazed they are still alive it was so bad. So my conclusion on pine tar.... 1) it stinks- on your clothes, your birds, and in your coop(I can still smell it 3 weeks later) 2) it does not work....at all. My final solution I separated my coop in 2.