The evaluation of suitable waterers for broiler chicks reared under hot summer conditions.

In four groups of 150 broiler chicks each the suitability of different waterers (ordinary pans I, clay II, continuous folowing III, automatic trough waterers IV) was tested between 0 and 8 weeks at daily maximum temperatures not below 40 degrees C, and their effect was compared on the growth and the feed requirements. The eight-week weights were 1105 g (I), 1114 G (II), 1194 g (III), and 1160 g (IV). They were significantly higher in groups III and IV, which is attributed to the lower (2--3 degrees C) water temperatures. The feed efficiency was between 2.01 and 2.07 kg/per kg liveweight.