it’s low 90’s with humidity 70% and excessive heat advisories for the next few days. does that make it a bad time to treat chickens with ivermectin sheep drench orally for lice? they are 1 and 2 year old choc orpingtons, they hate the heat. they have plenty of shade and the duck pools with nice wet ground around it where they lay to keep cool. Check on them every couple of hours they do look a little uncomfortable, but OK. It was at least 10 or 15° hotter than this a couple of times last summer and they were OK. I put them in the duck pool for a while and they just stood there in the cool water.