The supplement I use is based on what my hay lacks. My hay is tested so I know what its missing.
I have a nutritionist who mixes up my supplement for me. And just so you know deserthorse is only concerned for the horses well being.
Horses are better off outside not locked up in a stall. Just because others lock their horses in stalls doesn't mean its right. Yeah they survive but the effects of it aren't aways appearent to the owner who is clueless.
My horse live outside 24 7 I only have 5 acers 3 is for the horses so lack of land has nothing to do with it. My horses welfare is top prority period.