Just want to give an update for anyone that may have a similar situation. I had 7 chicks. First time chick Mom. 2 died First week. Tried to keep the entire room at 90°. They were 1-3 weeks old, big mistake. Had one sneezing when we got it, was told to give her Amoxy-Tylon, but by the time the meds came it (the day they came in) she died. The remaining 4 started to sneeze, cough, and gasp for air, eyes swollen. I started them on the Amoxy-Tylon for 7 days, after the 7 days, another one passed. Gave electrolytes and probiotics for 2 days, but they were still ill. Then gave the remaining 3 Baytril 10% per body weight straight. The tinest syringe, like .0025 to each (second line on a 1ml dropper), basically a drop of Baytril to each. Next day added Baytril to water. I also put VetRx on them each night, and put the eye Salve, starts with a T, eye antibiotics on the 2 with swollen eyes everyday from day one. 3rd morning of Baytril eyes are looking better, no mucus from nose, no coughing or sneezing. Will add Baytril to water today, day 3. They are going to make it and I am so happy I saved these last 3 girls. I was told by so many people to cull them and start over, upper respiratory will knock out the whole flock. But I was bound and determined to save my Babies. Rollercoaster of emotions, losing 4 of my 7, but so happy I saved some of them. They are now 4-6 weeks old, and are looking so much better. Has been a stressful month, but the these 3 are clearing up, pecking, scratching, eating drinking, and pooping good. Thank the heavens I found this group and learned so much useful information. I hope my post will help someone else save their babies as well.