My husband doesn't know guinea pigs yet. He bought some sweet corn and we didn't finish 2 pieces. He was about to throw it out because any fresh food grows little bugs instantly around here and asked if the guinea pigs eat that. I ripped the husk off and broken red guinea pig (I just haven't gotten around to naming them all) went nuts. You could just see her going "I know that sound! It's corn!" "Give me corn!" lol She ran off with the biggest piece of husk and started arguing back and forth with one of the others until I gave them another 2 pieces. My husband was going "wow they really like corn". I told him they'd probably eat their weight in corn greens a day if you let them. The now weaned pups that ended up from that group of guinea pigs we took in are trying their first corn. They aren't yet as enthusiastic over fresh food. The sow pups are learning from the one adult I left with them but I don't have a fresh food experienced adult boar for the other group.