I feed it to a few of mine. never use to till feed company recommended it for putting weight on my pony who was on box rest for laminitis (founders)
In small doses its good for their coat & skin (i also now feed 2mls twice a day to my sweet itch ponies)
In larger doses is good for weight gain/condition - I feed 10mls twice a day to my pony on box rest and my 3yr old who needs a bit of help maintaining his weight without extra bulk to his feed.