Hi Newbiegirl! Give this website a try for hay:
http://www.oxfordmeadowshay.com/mix.htm
This is a small operation that specifically seeds fields for small animals with a mix of 6 different grasses. The hay is organic and is sun dried. They say it's for bunnies, but it's just as good for piggies. Wayne, Jackie and Jim are very kind and helpful and they respond very quickly to inquiries. Looks like they're temporarily sold out, but maybe email them to find out when the next shipment is available. Very good for picky kids!