I just re-read that. Does it really say that? If it does say that, I just gotta say that my vet told me years ago that injectable penicillin is one of the injectable that shouldn't be given orally because it's not absorbed well if given orally.
Actually, that is the dose for chickens and other poultry too. Not sure where the other dose people recommend came from. :idunnomaybe someone extrapolated the chicken dose from the cattle dose. :idunno