I don't mean to come in and cause trouble, but gosh Erin, Peggysue has been awesome, rallying up sites, looking at feeds for you etc... and you keep shutting her down... you wanted advice with feeding, and yet you don't like any of the suggestions made.
I completely agree with Peggysue, the levels of sugars in some feeds are the cause to make horses heat up.... you need to find a fibre alternative.
It seems you are unhappy with the choices offered, if you're really concerned with their weight, I suggest you speak with a nutritiionist, who will help you choose the right meal for your horses, and what supplements to add in.
Peggysue, you're a legend for finding all those links in her area!
Again, not trying to be horrible, but it does annoy me when people ask for advice, are given it, and then don't really respect it.
Sorry Erin, I'm not trying to be mean about you personally.