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Naked-neck chickens
  1. John E. Cooper
  1. Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES
  1. e-mail: ngagi2{at}

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YOUR issue of March 19 carried a brief report about research at the Roslin Institute on naked-neck chickens, caused by a genetic mutation and enhanced by a vitamin A-derived substance, which produces a protein that suppresses feather production (VR, March 19, 2011, vol 168, p 290).

Your report goes on to say that research on these naked-neck chickens, which are presumed to be relatively heat-resistant, …

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