While it may seem like a good idea to have antibiotics on hand, you need to know what you are going to treat. For instance injuries you can use Penicillin or Amoxicillin, for respiratory illness Tylan50 is probably best. For a heavy hitter that might take care of most things Baytril may be the way to go - but you do need to consider that most antibiotics are not approved for use in poultry and/or there is an egg/meat withdrawal - each medication would need to be researched to find the appropriate timeline that you are comfortable with. You also need to think about who is going to consume the eggs/meat - is anyone going to be allergic to the meds you are giving. IF you sell your eggs or you have a family member that is sensitive to medications, it would be wise to make sure you throw the eggs away.What is a good antibiotic to keep on hand and do you have to have prescription for one?
Water soluble medications are prescription only. In some states all antibiotics have to be prescribed by a vet. In others, you can still find Tylan50 and Penicillin in most feed stores. You can also look to see what's available online, some people order fish antibiotics.