A friend has an 18 year old mare who recently has started to eat a few bites of food, then she will lay down, some times just "sitting up" other times layed out all the way. She will lay there for 10 minutes at most. Then get up and finish eating.
Doesn't do it all the time, every 3 or 4 days maybe. And doesn't seem to be in destress or hurting, no looking or biting at her tummy.
At any other time she is munching grass and moseying around with her 11 month old filly. We did consider the remote possiblity she is preggers, but don't think that she is...
Any suggestions would be helpful!