Poultry Production, by M. C. Nesheim, R. E. Austic and L. E. Card. 12th Edition. Lea and Faber, Philadelphia, 1979. 399 pp., illustrated. Price £10.00. ISBN 0-8121-0665-2. Food Intake Regulation in Poultry, edited by K. N. Boorman and B. M. Freeman. British Poultry Science Ltd, Edinburgh, 1979. 469 pp. Price £13.00. ISSN 0306-7610.