Walk through Fly Trap

     Dear Sanetters,
     I am seeking plans for a walk through fly trap for cattle.  I have 
     seen a similar trap at the Nebraska Sustainable Agriculuture Society 
     Annual Conference in 1996.  If any readers have knowledge of plans for 
     such a trap, or have experience with its usefulness, I would 
     appreciate the information.
     Thank You.
     Laura Ann Bergman
     PO Box 310
     Lancaster, MO  63548