Chickens are susceptible to a variety of bacteria and viruses, some of which can be deadly. While there are many antibiotics available to treat these infections, penicillin is often the first choice for treating sick chickens. Penicillin is relatively inexpensive and easy to administer, and it is effective against a wide range of bacteria. However, there is no standard dosage for giving chickens penicillin, as the appropriate dose will vary depending on the severity of the infection. Additionally, it is important to consult a veterinarian before giving any medication to a chicken, as improper dosages can result in adverse side effects. When used correctly, penicillin can be an effective tool for treating sick chickens and helping them to recover.