https://www.backyardchickens.com/forum/viewtopic.php?pid=3526423
see post #12
I am still looking around for the dosage...
https://www.backyardchickens.com/forum/viewtopic.php?id=359100
here's another thread
http://www.vetvax.com/antibiotics.html
if you scroll down, they give a dose for penicillin but I don't know if this is the same penicillin you have (I think there is short acting/long acting to choose from but I forget). Just check carefully and also notice that this isn't for poultry- it would be off label.
I have no experience with this in chickens.
The following is from this website:
http://www.avma.org/issues/policy/jtua_poultry.asp
Suggested Antimicrobials for Staphylococcus Intervention:
Class III: penicillin, lincomycin
Class II: erythromycin
Any antimicrobial selected for use, if not specifically labeled to treat Staphylococcus spp. in chickens is extra label use and must be used as outlined in AMDUCA.
Treatment Duration: Per labeled instructions or based on the veterinarian's clinical judgment.
Treatment Assessment: During and after therapeutic intervention, the flock should be carefully evaluated as to the success of the treatment. These evaluations can be performed by the attending veterinarian or by service personnel under the veterinarian's direction. Accurate records should be maintained on all treatment outcomes and included in the farm history and records for future reference.
Other Treatment Considerations: Often, Staphylococcus spp. infections causes low morbidity in a flock and treatment is not cost effective. The use of culling procedures will help assess the progression of this disease within a flock and determine intervention strategies.
Prevention: Identifying the predisposing factors is an important component in preventing Staphylococcus spp. infections. Predisposing factors such as litter quality, viral arthritis enteric disease, and upper respiratory infections can lead to Staphylococcus spp. infections. Identifying any predisposing factors and implementing preventative vaccination and management practices is imperative to prevent future infections.
