Sorry Lucinda, I disagree!
Baytril irreversibly inhibits bacterial gyrase, a key enzyme in bacterial replication, resulting in rapid destruction of the pathogens. Baytril concentrates in tissues, fluids and phagocytic cells of the respiratory system. Its potent bactericidal effect is achieved even at low concentrations.3
Baytril attains excellent therapeutic concentrations in pulmonary and bronchial tissues, secretions and phagocytic cells. These properties are of great value in the treatment of conditions such as acute and chronic respiratory infections like bronchitis and pneumonia, where the penetration of the antibacterial agent makes the difference in the speed of control of the infections
Mine have had baytril to good effect, unless the pig is allergic.
Make sure the vet weighs the pig, if quite big may need a higher dosage. For a mild infection, 0.2mls x twice a day is given by syringe, usually a shot by injection is given by the vet in the first instance. If the infection is deep seated, 0.4mls can be given x twice daily or if the pig is pretty big.