This is very bad pain in the abdominal area caused by spasm, obstruction or twisting of the digestive tract. For further reading: http://www.fussybaby.ca/what-is-colic.html Sweating,swishing tail,looking or biting at sides,constant rolling,and flank tightening.Rolling is very bad,make your horse get up and walk til symptoms subside.If they do not in time,call your vet.