I feed one scoop per day and one scoop barley - bag lasts about 2.5 weeks but the only thing that used to keep weight on him was D&H country cubes/mix and that has soya in so it's more important he can breathe than the cost of the equijewel
I also use simple systems precooked linseed in the winter as a top up but that doesn't put/keep on as much condition as the equijewel - wish it did !!!