Peggy I strongly disagree especially when it comes to young horses. Now if you have 100 acres of prime pasture that has never been overgrazed you are probably okay. But the majority of horses now are kept in small acreage farms and do not have access to prime pastureland.
If you have an ADULT idle horse that does nothing you can probably skip grain. But the majority will need it.
I have never seen a young growing horse that got enough protein and fat from hay alone. I just brought back 5 shetland yearling fillies home from a farm that does have 100 acres of pasture and that's all these girls had. While they are not in terrible shape they definitely lack bloom and substance. I have now started them on grain and they are much better looking already.
I will say in my years of experience I see way more thin horses then I do fat horses. And usually the person mistakes the bloated belly for the horse being fat and cuts them even further. Most bloated bellies are caused by the horse not getting enough protein.
I do feel that Equine Sr and Jr are great feeds for horses. Not all feeds are created equal for sure!
Aussie if you email me your shipping address I will send you a test no charge. Just be sure to follow teh directions exactly! If you need help just email firstname.lastname@example.org