I don’t give grass clippings to my horses, either-
They do a fine job on pasture all by themselves 😂
But I’ve helped on enough hay fields to know how fast things can turn the wrong way!
I appreciate the “thinking outside the box” approach!
However.
You are going to need to get in there w a rake and toss at the least daily, twice (or three times) daily might be safer depending on the temps and humidity where you live.
Having horses.... I can say w certainty that cut green...