hi - agree about not using antibiotics, but i must point out something that happened to me a few years ago that almost put me out of pigeons -
my birds became ill, droppings green, paralysis of legs, wings & torsion of neck & poor balance, young birds started dying, i went to vet and was given an antibiotic, i felt it made them worse dying a lot quicker, after researching internet i realised i had paratyphoid (salmonelois), i moved birds to baytrill, this did the trick and helped birds fight disease, although i made a decision that the birds were already subjected to disease too long so culled.
if i ever see these symtoms again - i will aminister baytrill without question
i feel a balanced approach is best