Thank you very much. I finally found a vet that works with chickens today. They gave me antibiotics for their water.
One more question. Are all respiratory deseases contagious?
I'm glad your vet was able to give you some meds, can you tell us what was prescribed?
Respiratory diseases are contagious. Infectious Bronchitis can make birds carriers for up to a year - but if you add birds during that time, you can keep the disease going. Mycoplasma, Infectious Coryza and ILT which are common, make birds carriers for life, even if some birds show no symptoms. Disease is spread be dust/dander, feathers, clothes/shoes, mucous, shared food/water, etc. The only way to know which disease you are dealing with is to have some testing performed. Your state lab is the way to go for this - you don't mention where you are located, so you can look up your lab here:
https://www.aphis.usda.gov/animal_health/nahln/downloads/all_nahln_lab_list.pdf
A side note, antibiotics will treat secondary infections due to illness, but won't cure the disease. Since you have meat birds and are treating them with medication, you will want to ask your vet what withdrawal period guidelines to follow concerning butchering.
If you plan on having more chickens, you may also want to do some research on how respiratory illnesses work, along with cleaning/sanitizing your housing between flocks. Oxine or Virkon S are both said to be fairly effective for cleaning.
Here's more info on respiratory illness:
http://edis.ifas.ufl.edu/ps044