I think you have every right to voice your opinion in a letter or note. I only hope the owners are just ignorant to horse care and proper feeding and not uncaring. Also that your note will taken' as a helpful suggestion.

Otherwise they will simply snear... wad it up and toss it away. Doing nothing other then telling you to mind you own business. To me personally the fact they are stalled 24/7 is far worse then the fact they get very little hay and grain. If they look in good weight, I don't worry so much about what they are eating.