I noticed when reading about it on the internet, it stated it was for skin lesions and tissue damage etc, but on the actual leaflet that comes with it, it states it can be used for respiratory problems. I think especially with the feral cats, it is much better to let them have the jab as getting tablets down them is so stressful and it can't always be done without getting your fingers ripped off, so on the whole, even though I don't rate it for respiratory, I would still use it as it's better than them getting nothing.