to answer your other question I have favorelles and have used both ivermectin orally at 0.25ml per kg of body weight for mites and also dusted them with no problems. Never at the same time though.
2cc if frontline if dosed anything like ivermectin for two birds would have been close to four times the dose if they drank it all. I'm pretty sure cc and mls are the same.
Thank you for the info. The girls are doing well and will soon be moving to the big coop with their mate and other friends. Thank you for all your help .