Table 1. Description of groups used in the experiment.

Group no.	Number of birds	Replicates (pen × birds)	Addition to littera (kg/m2)	Addition to feed (h:z ratio)	Total use H/Z (kg)
1	100	10 × 10	None	None	None
2	100	10 × 10	0.95 h1	starter, 0.5%; grower 1, 1%; grower 2, 1.5%; finisher, 2% (25:75)	78/234
3	100	10 × 10	0.475 h / 0.475 z2	starter, 0.5%; grower 1, 1%; grower 2, 1.5%; finisher, 2% (25:75)	78/234
4	100	10 × 10	0.95 z	starter, 0.5%; grower 1, 1%; grower 2, 1.5%; finisher, 2% (25:75)	78/234
5	100	10 × 10	0.25 h / 0.7 z	starter, 0.5%; grower 1, 1%; grower 2, 1.5%; finisher, 2% (25:75)	78/234

Notes.

¹h, halloysite

²z, zeolite

^aaluminosilicates were added on 5 dates: days 1, 10, 20, 30, 31 of rearing.