Table 2.

Percentages of total hens in each aviary pen observed dust bathing with access to one of 3 litter substrates.^*,†

	AstroTurf®	Shavings	Straw
25 wk	1.74 ± 0.60	4.56 ± 0.60	3.86 ± 0.60
28 wk	3.38 ± 0.60	3.32 ± 0.60	4.15 ± 0.60
50 wk	3.12 ± 0.60	3.73 ± 0.60	3.03 ± 0.60
68 wk	4.16 ± 0.60	3.64 ± 0.60	3.44 ± 0.60

^*Values are the least squares means (±SEM) with n = 4 pens per substrate type of AstroTurf^®, shavings, or straw.

^†Observations were made across 2 min every 20 min from 11:00 to 15:00 throughout 2 observation d at 25, 28, 50, and 68 wk of age.