I have a flock of 25 chickens. They range in age from 18 mos to 16 weeks. It is a closed flock, no birds in or out and so i don't undertsand why i am hearing some sneezing. Nothing excessive but it is more than one bird doing it. I might hear it once a day. I also have a roo who has made a squeaky sound when he breathes. but i have only heard it twice and days went by between hearing it. VetRX seems to stop it. Also i have a 21 week old pullet who makes a honking sound instead of normal chicken sounds. she has done it for weeks and weeks. eats good poops good and looks healthy otherwise. Is it time to break out the Tylan 50 or is this normal to have a slight respiratory thing happening during really warm weather? (It gets near or exceeds 100 degrees each day) Could dust be a factor? I have the Tylan injectable onhand. I also plan to worm them with eprinex this week in case it is a parasite but i think i have read that eprinex won't get the larvae in the lungs.