My ducks come and go and quite often damage their feet on rocks and blackberry thorns. Even jumping down and landing hard on the pad can start it off.
My first aid box is extensive as horses are always getting into trouble . The poultry part has
1. Terramycin spray
2. Amprolium
3. Safeguard
4. Avian vitamin pack
5. Epsom salts
6. Chlorsig eye drops
7. Vet wrap
8. Activated coal tabs
9. Broad spectrum water soluable oral antibiotic
10. Vicks vapor rub.
11. Lice and mite spray and sulphur powder to sprinkle the coop.
12. Virkon disinfectant spray.
Of course I add things when required but that is my ' base' kit.
On this site you can purchase the Terramycin ointment . Remember that it is a cattle product , when you are searching. I hear a lot of folk on this site recommending vetericyne which is also available on this site. The neosporin will do for now.
http://www.jefferspet.com/categories/cattle/health-wellness/eye-ear-care-1