I recently found out about the wonder that is Kleenmama's Hay!
I live in Washington State myself, so this is extremely convenient.
But I have a question, what would be the best type of hay for my two male, 3-year-old guinea pigs?
Kleenmama offers
bluegrass,
timothy (1st, 2nd, and 3rd cut), and
alfalfa/bluegrass mix.