I've got a 10 year old quarter horse gelding who had laminitis this time last year. He has not been on grass since. Lately, when standing in the cross-ties, will suddenly kick out a back foot and squirt out brown water from his butt. He has normal manure. He had this same thing just after the laminitis but it cleared up over the winter. It has just started up again recently, but there are no other signs. Has anyone seen this kind of thing?