Being the bigger strain, the energy requirements for growth for the BA strain are likely to be greater than for the other 2 strains under investigation. Higher energy requirements translate into higher feed intake and a pronounced compensatory feeding behaviour when dietary energy concentration is diluted in simple non-ruminants (Conrad, 1966). According to Teguia and Beynen (2005), high fibre levels reduce the digestibility of poultry diets. Initially, as dietary fibre level increases, higher feed intake is observed, a result of compensatory feeding behaviour (Conrad, 1966). Indeed, Burnham et al. (1992) observed that chickens increased their feed intake as the limiting nutrient in the feed decreased. This behavior is an attempt by the chicken to obtain more of the limiting nutrient to satisfy its dietary requirements. The mechanism regulating feed intake involves glucose level in blood stream. Richards (2003) suggested that when blood glucose drops, fat mobilizing hormones (growth hormone, glucagon and cholescystokinin) are released while the energy storing insulin is suppressed. However, such transient changes in plasma glucose level do not appear to alter feed intake in chickens (