Hello all, sorry if I have a stupid question but I just want to be absolutely sure before I use this product. On the box it said for cattle and swine only. I asked the guy who was selling it to me; he advised I shouldn't use it. But is this drug safe to use on chickens and is this the drug you use on your chickens? Here's a pic of the same product I purchased. Again I'm sorry if this seems like a novice question. Also, what symptoms are the red flag so to speak to absolutely use this product. Right now my chickens are sneezing and have a runny nose and a bit of congestion (raspy squawk). I don't know if the raspy squawk is a trait of the type of chicken (Delaware pullets) but any advice would be extremely appreciated.