Ok, so a 2lb bird weighs almost 1kg. (2.2 pounds per kilogram)
2.27% is 22.7mg/ml which means there is 22.7mg of medicine in 1ml of liquid.
Recommended dosage I found on the previously linked thread is 10mg/kg (some vets prescribe as much as 15)
So a bird that is roughly 2lb would need about 0.5ml of liquid to get the recommended medicine. Twice a day!
Here's an article on how to administer, with some great pics. I assume you have a syringe? Orally is easiest for me. Not sure which way you want to go.
https://www.backyardchickens.com/ar...dications-to-all-poultry-and-waterfowl.73335/