Hi all, I went out to the coop today to find my leghorn wheezing with most every breath. Her comb and waddle are bright red. I went out today because I had not seen any of my chickens come out of the coop all day today, which is unusual. Only the leghorn is wheezing. I also dropped a bunch of carrot shavings on the ground and nobody came to eat them. None of the other hens are wheezing. No one has any runny noses. Nothing else appears amiss. Yesterday, one of the hens laid our very first egg. I think it was our NH Red as she was doing a bit of an egg song when I was in just watching. I separated the leghorn as she was obviously wheezing and not doing an egg song. Should I start them all on antibiotics? Is having laid the first egg somehow stressful and has caused some illness? I have Duramycin 10 on hand, dose of 3/4 tsp to 32 oz, right? Also of note, I gave them 1oz wazine per 1 galloon of water on the 8th. There are 6 bantams all aged 16 weeks, 2 EEs that are 16 week, a leghorn 24 weeks, NH Red 24 or so weeks, and a Delaware around 24 weeks. They are in a large walk in coop with pine shavings, cleaned out every 2-3 weeks. Roosting boards cleaned about every other day. What think the experts???