Modeling Daily Feed Intake of Four Strains of Broiler Chicks

Variation in feed intake of broiler chickens

With many broiler diets, particularly wheat–based diets, rate of passage of digesta limits intake and growth. In many trials, the relationship between feed intake and apparent metabolizable energy (AME) was negative or insignificant. In some trials, the limitation to voluntary intake was so severe that negative relationships existed between it and FCR. This is a consequence of the diversion of ...

Analysis of the nonlinear dynamics of daily broiler growth and feed intake.

Daily BW velocity (BWV) and acceleration (BWA) of individual birds have been demonstrated to be oscillatory. Daily feed intake velocity (FIV) and acceleration (FIA) were hypothesized to be oscillatory and to have a positive relationship with BWV and BWA, respectively. Forty-eight male broiler chicks were individually caged and provided a commercial starter feed ad libitum for 49 d. BW and feed ...

Body Weight and Food Intake of Broiler and Leghorn Chicks

Age of market weight of broilers has been continuously reduced by approximately one day per generation during the past 40 50 years due to an average increase of 50 g/year of body weight at 42 days of age (Gyles, 1989). Although non-genetic factors such as improved feeding and management contributed to this growth rate increase, genotypic selection for growth seems to be the major cause (Chamber...

Campylobacter jejuni strains compete for colonization in broiler chicks.

Campylobacter jejuni isolates possess multiple adhesive proteins termed adhesins, which promote the organism's attachment to epithelial cells. Based on the proposal that one or more adhesins are shared among C. jejuni isolates, we hypothesized that C. jejuni strains would compete for intestinal and cecal colonization in broiler chicks. To test this hypothesis, we selected two C. jejuni strains ...

Effect of Feed Restriction on Performance and Immune Response of Two Commercial Broiler Strains