"Baytril, a fluoroquinolone known generically as enrofloxacin, is the first veterinary drug to be banned because it leads to the emergence of resistant bacteria. It is chemically similar to the antibiotic Cipro, which is widely prescribed to treat food-borne illness in people. Use of Baytril in poultry, FDA says, reduces the effectiveness of Cipro in treating Campylobacter in humans."Remember that bird medicine ? The medicine in it is
ENROFLOXACIN
it's a broad spectrum antibiotic
Source: http://pubs.acs.org/cen/news/83/i32/8332baytril.html
It's a great drug and I still use it even though it's banned.