Alright, here's another question from the newbie: I have two horses boarded at a high-end barn and I ride regularly. Our equines are absolutely pampered and I know that their hay is always the best of the best, but is it suitable for guinea pigs? I can get just about as much hay as I want for free to dirt cheap. So this may be a stupid question, but is there any discrepancy between hay that's good for the horses and hay that's good for the guinea pigs?