My two boys Nilla and Mocha had URI when I adopted them. They were 1 months old. The URI was very resistant to Baytril and Bactrim.
Finally, I learned about nebulizing with Gentomyacin. It worked! It changed their lives forever! My vet prescribed the Gentomyacin and saline solution. I bought the pump and nebulizer from a medical supply store in Fremont , CA, Haller's Medical Supply. You can also rent it.
I nebulized each boy separately for 20 minutes, twice a day, up to 10 days. I lessened the sessions to 15 minutes on the 7th day because they were really improving. I started to hear the improvement in 5 days. The vet told me to completely seal the chambre, not to leave it a jarred. He said that they will be receiving plently of oxygen from the pump. You can look at my procedures on how to assembly a unit. It is really simple. Click on the link below:
Please feel free to ask me any questions regarding the assembly.
Goodluck to all the little veets veets out there.