Table 1.

Perch, platform, panel, substrate bales, strings, substrate, and feed scattering designs for broiler breeders used in different studies.

Reference	Material	Period	Design			Genotype		Stocking density
			Height above ground	Dimensions (length × width × depth)	Style and placement	Slow growing	Fast growing
Perches and platforms
(26)	Elevated slats Grids above feeders Plastic beams	Production	N/A	N/A	–	JA	Rossa	N/A
(27)	Wooden beams	Rearing and production	25, 50, 75, and 100 cm 55, 68, 115, and 138 cm	N/A	Aerial perches Aviary tiers	Sasso	Ross 308	N/A
Panels
(18)	Frame: wooden bars, mesh: black plastic and chicken wire	Production	–	70 cm × 10 cm × 70 cm	Center of house	–	Roaster linea	6.7 birds/m2
Substrate bales
(13)	White wood shavings	Rearing	–	79 cm × 38 cm × 28 cm	Plastic covered, corners	–	Ross 308	10.7 birds/m2
(28)	Wood shavings	Rearing	–	N/A	Plastic covered	–	Ross 308	N/A
Strings
(13)	White polypropylene strings	Rearing	Top just above bird’s head	16 cm long	2 locations (center and wall)	–	Ross 308	10.7 birds/m2
Substrate
(29)	Wood shavings	Rearing	–	N/A (depth)	Entire pen	–	Hubbard S	N/A
Feed scattering
(30)	Standard commercial feed	Rearing	–	–	Entire pen	–	Hybro G	2.7 birds/m2

N/A, information not available.

^aGenotype not specified further.