Boiled Barley

Shads having a hard time keeping weight this winter. I've upped his feed twice in the last 6 weeks or so. Im guessing (havnt weighed it lately) he's getting about 11 kilos of feed each day.
He's teeth are in good order, he's due for worming so ill get that done, but im thinking about changing his feed around again and adding some boiled barley. He used to get it a couple of years ago when we competed more, but I've forgotten how much I gave him. So how much should I give him?

Also, can I freeze it or something? I don't want to be boiling it each day..

So no one on this forum feeds barley?

Barley is a high energy feed that should be fed in conjunction with bulkier feeds to ensure there are no digestive upsets. It needs to be boiled before feeding and you cannot allow it to ferment or it will cause tummy upset. Unfortunately, you should feed it straight away. Introduce it slowly to your horses diet, and I believe 1.5kg of wet weight boiled barley is adequate for most horses..?

I know it needs to be boiled and it will be fed with other feeds. Thanks for the weight estimate, I might get a bag this week and see how he goes