I order the Oxbow Organic food for my guinea pigs and the shipment got lost. They said it will be up to 10 days before I get it now. They are out of food as of tonight. Will it mess them up very bad if I have to feed them some other kind? I can't get any good food for them around here, so it'll be something not too great, sadly. I don't know what to do for them. I'm so MAD!!