There are so many different views on colic some say that the gut twists when the horses rolls, others say that the gut has already twisted and allow the horse to lay down.The symtoms of colic are that of the same as grass sickness so if you are ever in doubt call a vet straight away, however the best solution of colic i,ve found is to try to pin point what exactly it is causing the problem which stands to reason.But failing that i came across this website that is a pot of gold to me she is a equine nutritionist and you post your queston on the forum and she has a quick reply,it as helped me no end the lady's name is Dr Getty,www.gettyequinenutrition.com