He's a week old, he got worse over night. Last night he was breathing heavy, and looked like he was sneezing. Now he's doing this with his mouth. I tried to isolate him, but he didn't want to, he jumped out of the box that was in the brooder and back out with the other chicks. Out of 38 chicks, he's the only sick one. I do put ACV and Garlic into their water though. I don't get why after a week he's having issues rather than having issues the day after being brought home.