I'm sorry your horse is having this issue.
Has your vet been out to check her?
Is she eating OK? Does she have any food coming out of her nose?
If you feel down the left side of her neck in that "groove" do you feel anything hard like a lump?
How long has this been going on?
What color is the mucous?
Have you had her teeth checked recently? When were they floated last?
What do you feed her?
Hi Dr. Hinson:
The mucous is clear but when she eats it does turn greenish color. It seems that what is going in her mouth is coming out of her nose. She had her teeth floated earlier this year. I feed her timothy, alfalfa/bermuda pellets and Integrity senior. This is the third time this year she has had something similar. The other two times my vet did come out. He is recommending that I take her to go get scoped which posses some difficulty since I don't have a trailer and the hospital is about 45 minutes away...buy I am working on it. I really appreciates what your thoughts might be on this. Oh, I have not felt the side of her neck yet...but I can.
It really sounds to me like she has choke.
Choke is a condition in horses in which the esophagus is blocked, usually by food material. Although the horse is still able to breathe, it is unable to swallow.
Horses may develop choke if they do not chew their food properly. Therefore, horses with dental problems (e.g. acquired or congenital malocclusion, loose or missing teeth, or excessively sharp dental ridges) that do not allow them to completely grind their food are particularly at risk. In addition, horses that swallow large pieces of food (such as large carrot or apple slices), or greedy animals that bolt their feed and do not take the time to chew properly may suffer from choke.
Signs of choke:
If a horse is suspected of choke, a veterinarian will often pass a stomach tube down the animal's esophagus to determine if there is a blockage. Failure to access get the tube down into the stomach indicates a complete obstruction; difficulty passing the tube may represent a narrowing; or a partial obstruction. Radiography (xrays) and endoscopy are also helpful in diagnosis.
I would strongly recommend getting her scoped and having xrays done if needed.
Anytime food and water is coming out the nose it means the esophagus is blocked. If you can't get her scoped just yet, have your vet out immediately and have them try to pass a tube to see if the esophagus is blocked. Sometimes the blockage is not from food but it could be a tumor of the esophagus (that is why the scoping is important).
I hope this helps! Let me know if you have more questions!