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Compensatory Growth in Intensively Raised Bull Calves^{1, 2,}

The Volcani Institute of Agricultural Research, Bet Dagan, Israel

Abstract

IT is well known that a relative increase in rate of gain occurs when calorie restricted feeding is followed by realimentation. The broad subject of compensatory growth has been reviewed thoroughly by Wilson and Osbourn (1960).

The view that farm animals utilize feed more efficiently when growth is continuous has been widely held. Its major advocates have been Watson (1943) and Guilbert et al. (1944). Meyer and Clawson (1964) have shown that sheep are unable to compensate, on a fat-free basis, after periods of calorie restriction. Winchester and Howe (1955) and Winchester and Ellis (1957) have shown that steers and heifers subjected to 6, 4 and 3 months of restricted feeding, followed by adlibitum feeding, achieved the same weight as control animals without consuming more feed and had comparable dressing percentages. In none of these studies was body composition analyzed.

The object of the present research was to study the effect of the major factors which affect the degree of compensation following periods of calorie restriction, and the effect of such a restriction on carcass composition.

¹ Contribution from The Volcani Institute of Agricultural Research (N.U.I.A.), Bet Dagan, Israel. 1971 Series, No. 1859-E.

² This research has been financed in part by a grant made by the U.S. Department of Agriculture, under P.L. 480.