That was verbetum from the book. Bob is just guessing so it really would be good for a vet to see her. I think I remember you saying she was short of breath, I don't remember you mentioning a cough.
It apparently could be viral rhinopneumonitis, viral arteritis, influenza, infectious bronchitis or strangles. Until she is well, I would take precautions to not transfer any germs to Okie. See him first, etc, and then SL.
I vac her for Rhino and influenza. Do you call it a cough? Just that one time she had to stop and hack that stuff up. The force was strong enough that she got it on my sweater. After that just dripping. I have her in the barn but I decided not to put the blanket on. If she starts a fever tonight she might get too hot and it seemed comfortable.