WOW, hmm, 5 for just the poultry...
I have Tylan injectible, though I hope to never need it. Mostly for the other animals, but I feel safer having it on hand in the event of an infection, whether a wound, respiratory (debating with myself whether I would treat or cull, or whatever.
I haven't found Corid YET, but when I do, that will be something I keep on hand. Simply because dogs, bunnies, and poultry can get cocci.
I keep triple antibiotic ointment to use for any injury to prevent infection.
I also have baby bird formula in case of a chicken not wanting to eat, or injuried beak, etc.
Otherwise, that's it. I do keep a tool chest with vet wrap, bandages, guaze, etc in case of a bleeding emergency, horse injury, etc. Much of what I keep in my 'live stock' kit is for the other farm animals, but could be used on the chickens if need be. I'm the type to treat what I can, but know my limits and will either consult a vet to help treatment or have them put down if treatment is way out of my limit, or if treatment won't help.