I've had my cavies for 2 months now and they have been on a diet of fresh grass, pellets and a few vegetables. Yesterday I gave them hay for the first time. They still haven't eaten it. The hay I give them is Versele-Laga meadow hay. I don't think they have had hay before because the breeder who I got them from feeds them fresh grass and banana leaves instead of hay. Also, they don't eat anything dried like grass that has been dried up after 2 days. What should I do about this? I'm going to feel like I've wasted my money if they don't eat the hay.