I picked some up at a local expo and fed off all the tiny ones, but now the rest have gotten too big to feed to everyone except Martha, who won't eat them-- grr! They are almost out of food, is there a natural non-toxic food I could find locally, like grape leaves, that will keep them going until they can pupate? How long can these guys live without food? I'm not buying hornworms again until I have a wine cooler to keep them in, they just grow too darn fast! :P