I can't tell if my horse is choking or just has a cold...
This morning when I was feeding her, she just stopped eating... I heard her throat making a gurgling noise, so I thought she was choking(so I started rubbing it)but she is in a pasture... so she walks away..
Its been close to an hour now, mucus is just coming out of her nose, and lots of it... that's why I think its a cold.
If this has been on-going for an hour and you aren't sure what is causing it, it's time to have your vet out. It could very well be choke or it could be a respiratory infection. But you need to find out and deal with it appropriately before you end up with a more serious problem.
I hear you that she is a rescue and difficult to catch, but if she does have a choking problem, having her out in the field where she can continue to eat is not a good idea. She may have a partial blockage that will only become worse with time. I would get her in a stall or arena or something with no food -- only water -- until you can get the vet out.
As a rescue, she may have developed poor eating habits (rushing mainly) that contribute to choke. I had a perfectly healthy horse come here, but she had never had hay -- first time she got it she didn't know how to eat it and choked. Rescues have issues :(