Good evening. I am hoping to get some advice on treatment for chicks that have just started sneezing and sound crackly/wheezing when breathing. This has started within the past 24 hours. I have not noticed any eye or nasal discharge.They are approximately 2-3 week old chicks and a variety of breeds purchased from Rural King. They are housed in my garage in an old large metal water bin with a heat lamp on one end and pine bedding. They are on a medicated chick starter. They are all still appear to be eating and drinking well but a few appear to be a little lethargic. The garage is large and well ventilated and the bin is open. Should I do a course of antibiotics, if so what kind and dosages please. Also would it be good to do an electrolyte and probiotic water additive?