Baytril is a medication used to treat RI's. In fact, it is quite the wonder drug as I've also had it prescribed for an eye infection AND a kidney infection.
I will note, when my gal had pneumonia she DID NOT have sticky or thick saliva. She had a heavy, raspy breath, and quite often was taking big, deep breathe's to get the air 'in'. Basically what I'm saying is, don't 'assume' its an RI as the symptoms are not always the same, cham to cham.
Again, good luck!
, also, I hung a heating pad on the out side of the cage so she also has side heat, she snuggles right in by it, but dont put it to hot- I use the med setting, also - you can try pedialyte, but cut it 1 to 1 is what I did - by all rights she should have died days ago- at the vet we found out she still has severe URI, but also a broken jaw, and bone infection - but I had her on bytril - but it just did not work,, so she is changed to the fortaz - I even asked the vet if treating her would be to hard on her, and if maybe putting her down was more humane, but she said if she has fought this long, and is not in great pain, she felt we can try, but she also is going in every 3 days for the next week to be sure she is improving- but I have been feeding her via drop by drop 7 drops of bug juice, 12 drops water/pedialyte every 3 hrs for almost 2 weeks - this is what I have tried, and she is my 2nd cham, another rescue, (my first was also a rescue, but only lived 5 days )and every Am I get up, so scared to look in on her- but there she is , still fighting - and I also had a very hard time getting a vet apt- I had to wait a week, and thought for sure there is no way she would make it that long, but she did I am very new to chams, so I can only offer you what I have done- I wish you the best of luck , and will add your little cham in my prayers 
