the tylosin isn't a drug that most vets carry. It's usually one that you would have to have them special order or formulated...but baytril does gram positive and negative bacterias anyway. the problem is that without doing a culture and sensitivity of the bacteria, you don't know which ones work. A culture is a minimum of 100 bucks and it might throw a false negative now because she's been on antibiotics. I would have to have her off usually for like 3-5 days and then culture her mucus and see what it comes back as.

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