Here is the guinea pig shopping list I got from GPDD a couple months ago which is like my bible it tells you everything they can and can not have hope it helps with the leeks issue. http://www.cavycompendium.com/forums/showthread php?t=7501&highlight=guinea+shopping+list Mary Mentz Marynwill2006 at earthlink.net www.teddybear201.blinkz.com