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. 2021 Oct 20;101(1):101547. doi: 10.1016/j.psj.2021.101547

Table 5.

Proteins and energy intake of IC of different age categories in scavenging, semi-intensive and intensive systems.

Categories/Age in weeks Scavenging
 Semi-intensive
 Intensive
 References
Proteins (%) Energy (Kj) Proteins (%) Energy (Kj) Proteins (%) Energy (Kj)
From 5 to 8 - - - - 17.79 365.02 Chemjor 1998; Kingori et al. 2003
From 8 to 14 - - - - 14.36 540.09
From 14 to 21 - - - - 13.85 832.21
From 14 to 21 - - - - 10.9 971
From 14 to 21 8.5 910 - - - - Kingori et al. 2007
From 13 to 25 - - 11.7 949.04 - -
Growers and mature birds 8.5 910 - - - - Birech 2002
Laying hens (46−54) - - - - 9.7 1,100 Kingori et al. 2010
Laying hens (42–50) - - - - 14.77 949.04 Kingori et al. 2014