Upper respiratory infection is in the upper part of the respiratory system which would be the throat, nasal passages, runny eyes, and facial areas. bun may have sneezing, and snot and sound congested
Lower respiratory infection is usually a URI that has advanced into the chest and lung area. it is more serious and can lead to pneumonia
A lower respiratory infection can be diagnosed by a chest x ray ; an upper could bediagnosed by symptoms and physical exam alone but by taking a culture of the discharge one can determine which drug wuld be most helpful ..most vets just start a med and see if it helps
because of your location I will just list drugs that are commonly used
Baytril oral may be effective temporarily but symptoms often reoccur because many bacteria have become resistant to baytril ; injectable baytril (given intramauscularly ) is usually more effective than oral .
I wouldn't suggest baytril unless the vets have nothing else.
Bicillin injectable is a really agreat drug. I gave subqutaneous injections every other daytomy bun Babette's (RIP) and her lower respiratory infection which was out of control and resistant to baytril disappeared
oral zithromax / azithromycin ( another good drug ) and when given in combination with bicillin injections packs a powerful punch (per Randy)
Chloramphenical (oral) is another older drug that is fairly powerful but it is important that the person administering the drug does not get it on their skin.I gave chloramphenical in eye meds and just wore gloves when giving it
Zeniquen oralis in the baytril family but according to Randy it is more efffective .;I have never given this drug
Iwill just give you the medi-rabbit list of acceptable and not acceptable antibiotics for rabbits and you can print it out and give it the vets.
I just mentioned the drugs that we most recommend on this forum.
These are the safe drugs
http://www.medirabbit.com/Safe_medication/Antibiotics/Safe_antibiotics.htm
enrofloxicin is the same as baytril . Zithromax is the same as azithromycin
These are the dangerous drugs
http://www.medirabbit.com/Unsafe_medication/dangerous_antibiotics.htm
some drugs are dangrous orally but fine if they are injected.
Amoxicillin is always dangerous
I am sorry that you need to leave again but you are doing the best that you can.