Links
  - www.progressivedairy.com
    (article about outside feeding in Us dairy magazine)
  - www.hoards.com
    (interesting article about bunk feeding)

   Other dairy building consultants with the knowhow of
   outside feeding:

  - www.fiveg.com
    (dairy design office, Texas Usa)
  -
www.dairylogix.com
    (dairy consultant office, Ontario Canada)
  - www.agrinova.org
    (dairy design office, Denmark)
pictures