[muffin]

It's very unusual for a guinea pig not to want to eat hay. If I were you I would try to encourage them by mixing in some Oxbow Timithy hay. It is specially recommended for guineas and rabbits that have gone off eating, or won't eat much hay. My three love it. They get regular meadow hay, and will eat Oxbow Orchard grass, but timmy comes first, it's by far their favourite food, maybe even on a par with veggies.