Permelia is my favorite pullet and is just not feeling well. This began yesterday evening (4-7-2012) and I'm new to raising chickens. Please Help! I've included a video of her cooing but she is also very lethargic, sneezing, and this morning had a snot bubble on her nostril. I have read it might be a respiratory infection and to get some Tetracycline? And/Or some Apple Cider Vinegar? Her crop feels fine and she is eating and drinking. When she is sleeping her little beak opens a bit when she breaths. Her poop was fine and free of worms. I read somewhere to smell her breath and if it smells sweet then she may have gapeworms. Her breath smells sweet but I smelled the breath of the healthy babies and their breath smells sweet too. She still eats Purina Medicated Chick food and has access to chick grit. I give them alive and dried mealworms, grapes, lettuce, scratch, and sometimes cooked rice in the evenings. I felt all over her body for anything odd and didn't find any puncture wounds, swelling, or anything besides her apparent head cold. I've read a chicken can die very quickly and am most concerned and want to begin treatment ASAP! Please help. Thank you in advance for any response!