Baytril 10% liquid can be used for reproductive infections. Dosage is 0.05 ml per pound given orally twice a day. For an 8 pound bird that would be 0.4 ml, for a 7 pound hen give 0.35 ml, for a 5 pound hen give 0.25 ml, etc.
Amoxicillin can be found online for fish—Aqua Mox 250 mg.
Here is a...