I just got a new horse a few weeks ago. She is a registered quarter horse paint and is 9 years old. She does the most peculiar thing after she is done eating. When she is finished eating, she goes over and hangs her head over the top rail of our round pen. The top rail is just tall enough that it comes up under where her head meets her neck. I know it sounds funny, but just looking at her, it looks like she is "hanging" herself.
She puts her head over the rail, then drops just her head down. At first, I thought she was just putting her head over the rail but after I watched her, I realized she is dropping her head down and there is pressure on her throat. The only time she does this is after she eats. She does not have any visible signs of an eating problem such as choaking and such. Anyone have any ideas?