Note: This post concerns a friend’s horse and I am trying to provide as much detail as possible.
My friend has had this smaller paint gelding since it was a foal and is 8 years old now. This problem only started a few years ago. When the horse starts pooping it is a cow pie but at the end there is a few solid pieces. 4 different vets have looked at the horse and can’t find anything wrong. A stool sample was sent in and they found nothing wrong. He put the horse on probiotics for 5 months but nothing changed. As far as I know they deworm him too. Also, switched up the diet to see if anything was upsetting his gut but again nothing changed.
Is there any problems that wouldn’t show up on a stool sample test? I’m curious as to what started this?