Review: Feed withdrawal and non feed withdrawal moult

According to Bell and Weaver (2002); ‘Moulting is a natural process in adult birds to renew feathers annually under hormonal influence’.   Follett (1973) provided a comprehensive review of natural moulting, which is induced by environmental and nutritional cues, with decreasing day length initiating gonad regression (Follett, 1973). Temperature variation and photoperiodic changes induce circadian and circannual rhythms (Berry, 2003). Manifested by the neural and endocrine systems, t