it could be an ear infection (which usually only happens with mites or respiratory illness) ... she sounds very ill with those symptoms and in that case I would not take any chances. I rarely suggest meds but WES and many others feel terramycin is not sufficient for anything other than vERY mild symptoms and Tylan 50 is then recommended...here is an article on that from a vet:
http://www.afn.org/~poultry/newsletr/1996/psep96.pdf
Chicken Medications
by Dr. James Barton and Clarence Gillihan
(excerpt)
".....Bacterial Diseases:
Purchase a bottle of Tylan 50 and several 3cc
syringes with 25 to 30 gauge 1/2" needles. Give your hen 1 to 1 1/2 cc. of Tylan under the skin of the neck .........Continue daily injections for three days but not more than five. Withdrawal time is one month. Tylan does not have much activity against coccidia, but it is very good against Mycoplasma bacteria which is responsible for some respiratory diseases.
To inject Tylan 50, pull the hens feathers back
to reveal the skin on base of the the neck on her back.
Lift the skin up and insert the needle gentlty but firmly into the skin just far enough to allow the Tylan to be injected. You will be able to feel it. Be careful that you do not inject yourself. Make certain that you do not push the needle through the skin and out again not injecting
at all...........................
Because Tylan is so powerful, it is recommended
that you purchase some Beneficial Bird Bacteria
and feed it to your chicken after she recovers.
Tylan wipes out all the benficial bacteria that is normally present in a chickens digestive system. Also, Tylan can kill skin cells near the site of the injection so you should not use anything stronger than Tylan 50 - a stronger variety, Tylan-200 is also available at your local feed store, but this will likely do more harm than good.
When purchasing syringes, get them from a
local drug store. The 'human' grade needles are a little sharper than the vetrinary grade. The cost is about the same and your hen will thank you...."
