We had a ferret with a severe respiratory infection that turned into pneumonia - we kept him on Clavamox, Baytril, and Amoxi (overkill, I know but he also had several other types of infections) for around 3 weeks. This was because he did not "seem better" (he still had symptoms) until 2 weeks, and we always do one extra week past the "seems like you're cured" phase. Not scientific I guess but it did the job. I hope your little one feels better soon... Laryssa [Posted in FML 6754]