Please when talking about disease someone use the full name at some point, so we (newbies) can look it up.
WHAT IS MS???
What is MG??? I'm assuming upper respiratory illnesses?
Mycoplasma Gallisepticum, also known as Chronic Respiratory Disease, or CRD. It's caused by mycoplasma bacteria and once a bird gets it, symptoms can be treated, but the bird always carries the disease for the rest of its life, and can have symptom flare ups whenever it is stressed. However there is a medication for swine called Denagard that it has zero resistance to, and some people after treating their birds with that for six months straight say they have been able to eradicate the disease without having to cull their birds. It can also be given monthly as a preventative dose.