Post Colic surgery care
Typically if there was no resection there would be no long term diet changes. However, soon after the surgery is it best to feed the horse highly digestible, good quality feedstuffs. These can be fed in small frequent meals almost as soon as they get out of surgery. They cannot handle the full amount of their ration right away so start with 1/4 to 1/2 of their total maintenance ration and then slowly build them up to their full ration in small frequent meals over the course of a week or two. Hand grazing for short periods would also be beneficial. Also consider using a complete pelleted feed for more calories if that is needed or a fat supplement like rice bran. As always plenty of fresh water should always be provided.