Yes, every one is out of amoxicillin capsules. They do have 10% amoxicillin powder to put in the water at several sites. I think giving most antibiotics directly is the better option. Enrofloxacin which is banned for chickens, but sometimes prescribed by some vets for reproductive infections, is available without a prescription.
https://jedds.com/products/enrofloxacin-10
Dosage is 0.25 ml for a 5 pound bird twice daily for 5 days.
https://jedds.com/products/amoxicillin-10-powder
https://jedds.com/products/enrofloxacin-10
Dosage is 0.25 ml for a 5 pound bird twice daily for 5 days.
https://jedds.com/products/amoxicillin-10-powder