Deer don't choose to eat hay grasses (fescue, etc) when it's growing in a field- why would they eat it once it was cut, dried, rolled into a ball, and left to rot for months? They would literally have to be starving to death to eat it. Their digestive systems are completely different from a cow's, and they can't efficiently process forages with that high of a C:N ratio.
BTW, if they were attracted to it, hunting over hay bales placed in a field to attract deer would be the very definition of hunting over bait.