My moms car broke down, making it impossible for us to go anywhere for the last day or so. I was intending to get more hay on tuesday, but I couldn't. Since then, I have less than a cup left (maybe half) of hay. Her car got back tonight, but I we wont be able to go anywhere until probably 2ish tomorrow. Can they go that long (12 hours) without hay? I have two guinea pigs. Will they be okay? I know hay is really important to their diet. And is there an alternative to hay that I can give them just until tomorrow evening? Thanks!