Here's what I'd recommend to keep on hand for first aid for your birds:
Syringes – 1 cc with small needles
1 percent iodine or Betadine solution
Popsicle sticks or tongue depressors for splinting legs and wings
Veterinarian’s name and phone number
Emergency phone number
What's missing? What would you recommend?
Have a separate isolation area for sick birds. Remove any bird from the flock as soon as you notice signs of illness. Isolating a sick bird gives you a better opportunity to observe and treat it. Removing it from the flock can prevent a contagious illness from being transmitted to the rest of the flock.