I have a rooster and a hen that are not right. Here's what they don't have: Runny Nose, Sneezing, Coughing or smelly head. What they do have: Head shaking Beak stretching (Not gasping) Tail feathers rough SLEEP ALL THE TIME!!!!! I already have treated with Tylan 50, Valbazen and Ivomec. Found lice eggs on rooster. Been dusting him every 7 days for the last 3 weeks. Found 1 poo pile in hen section with round worms. Treated everybody with the Valbazen. Seemed like hen went down after first treatment. I just can't figure this out.