It sounds like SL does have strangles. Is she on antibiotics? If at all possible, have your vet - in your presence - examine her. Take his advice, not the advice of the barn vet - who should have done a lot more a lot sooner. Okie did not soundlike he had strangles
My vet saw her today. I will definitely be there when he comes back. He gave them both injections. I wrote it down at work. bay...something.
They have some of the same symptoms though. Lot's of green snot and coughing. Okie had a stiff neck too. I could not feel Okies lymph nodes like I can her's though.