I live in a remote place. Our local feed store doesn't carry much in the way of "chicken" medicine, and even the ones within an two-and-a-half hour drive don't have a great selection and are closed on Sundays. So I'd like to be a little proactive here, and have two or three of the most likely used antibiotics on hand, just in case. I see that many are available on amazon. I see Tylan popping up over and over as a good medicine for respiratory problems. There is a water-soluble and an injectable. Which should I get? If I get the water-soluble, how much do I add to a gallon of water? If I get the injectable, how much do I use, and what size syringe/needle? Where do I buy a needle? (They are strictly prescription-type items for people, are they for animals?) I've given shots to my husband, so I know I can do it, but what are the directions for giving a chicken a shot? Is there a medicine I should have on hand besides Tylan? What would be a good general medicine to cover common problems Tylan doesn't cover? And what type of infections would those be? I want to keep things as simple as possible. Thank you in advance.