Originally Posted by southview charlie
What is the answer to limit feeding drafts to keep their weight down?
As with any horse, they need at least about 1.5%bwt daily in roughage, and their digestive system doesn't do well if there isn't near constant small amounts going thru it - so I imagine your drafts were probably gnawing the planks because their tummies were empty & aching. As others have mentioned, some form of 'slow feeder' would limit their intake but allow them free access. Otherwise you could feed them small amounts little & often, or if they're in a big paddock, spread their hay in small piles, as far away from eachother as possible, or use grazing muzzles.
there is never too much hay fed
That is simply not right, especially as most hay is grown from rich, cattle fattening improved pastures.
To OP, feeding hay that's tested low NSC, such as many native or unimproved grasses, is advisable if possible.