Oh damn... i don't know how i missed that.... yeah never feed lettuce...... Iceberg lettuce has absolutely no nutritional value and is like junk food for lizards, they love it but it's bad for them. romaine lettuce is slightly better but still should not be used often. you want to stick with mustard greens, collard greens, dandelion greens, turnip greens, etc. NO spinach, cabbage, lettuce.... kale i believe is ok in small doses.. if i remember correctly it's one of the ones that should be used sparingly