Just some FYI .Since I don't have your email address . And am as about computer literate as a bull trying to play piano . I sent something to ravyn and asked her to forward it to you . the article that section I posted came from just good reading I thought. And just throwing something out there for you to think about . Now as to whether it's possible or not for them to have worms not being on the ground or near other chickens . One would have to consider what is near . Eggs are microscopic and can survive a complete dry out . They like many many more chicken aliments can be carried on the wind . jmo not 100% sure about it though .