Re: safe starch vs untested grass hay
It's hard to give a clear answer without more specifics. Need to know how much by weight he's getting of each. A little (?) Safe Starch Forage may or may not keep him for the day.
In my neck of the woods a flake can weigh a pound and on up to four or five depending on various factors.
Nancy C in NH
ECIR Moderator 2003