I started out with one chick sneezing and slinging it's head in doing so. Now I have 3 chicks doing the same thing. All are 2-3 weeks old and came from breeders, electrolytes and probiotics in the water. Tylan 50 injectable administered orally in the first chick for 3 days twice a day and it's still sneezing. They all look fine and are eating and drinking normally. The chick I have been giving tylan 50 to had bloody stools but they are gone now. Any advice? I have 19 chicks total and 3 in quarantine in a separate brooder. I will also add there is no discharge coming from their nose.