Layer Cage Depth Effects on Nervousness, Feathering, Shell Breakage, Performance, and Net Egg Returns

Hill, A. T.; Hunt, J. R.

doi:10.3382/ps.0571204

Cited by 39 publications

(24 citation statements)

References 9 publications

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“…I 979) , the tests were: conducted under as near practical conditionsr as possible. ln contrast, the layers in the experiments of Lee ( 1978), Robinson ( 1979) and Hill and Hunt (1978) …”

Section: Specific Gravity and Eggshell Breakagementioning

confidence: 99%

“…ln consequence only the three birds per cage in the R cages laid eggs which were significantly heavier over the l5 laying periods ( Hill and Hunt (1978) and in this exoeriment.…”

Section: Egg Weightmentioning

confidence: 99%

“…There was a significant effect of cage depth and rearing system upon hen day f'eed consurrLption (Table 3 Swanson and Bell (1917), Hill and Hunt (1978) and Bell et al ( 1979). ln contrast Lee and Bolton (1916) and Lee et al ( 1978) found that layers in S cages, with the extra feeding space, consumed less feed while producing equal and more eggs.…”

Section: Feed Consumptionmentioning

confidence: 99%

“…The increased egg production from three bird cages was consistent with earlier reports by Wells (1973). Hill(1977) and Hill and Hunt (1978) showing that decreased populations resulted in increased egg production. The in the oarticular case of three birds at '164 cmr/bird, egg production was significantly less in R cages.…”

Section: Egg Productionmentioning

confidence: 99%

“…Muir and Gerry (1976) and Lee et al ( 1978) fbund that cracking rates were higher in D cages. Bell ( 1977), Hill and Hunt ( 1978) and Robinson (1919) ln the case of Martin (1911), Muir and Gerry ( I 976) and Bell (1912. I 979) , the tests were: conducted under as near practical conditionsr as possible.…”

Section: Specific Gravity and Eggshell Breakagementioning

confidence: 99%

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Effects of Cage Floor Shape on Layer Performance

Hill¹,

Hunt²

1981

Can. J. Anim. Sci.

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In a factorial split plot experiment, 1536 pullets were tested for 60 wk in four replications with two rearing systems (cage vs. floor), two genetic stocks, two population size-density combinations, and two cage shapes. Three and four Shaver 288 layers per cage were each tested at 464 cm2 and 542 cm2 per bird and three and four Hubbard Comets per cage each at 542 cm2 and 610 cm2 per bird. Layers were housed in both deep and shallow cages. Cage depth had no effect upon nervousness, feather wear (except for the wings), mortality, egg specific gravity, broken eggs or net egg returns over feed and bird costs. Birds in shallow cages had significantly less wing feather wear, laid more eggs, consumed more feed, had inferior feed conversion, larger body size and lower percentage of Grade A eggs. With the exception of the feathering on the neck, back and underside, there were no consistent two-and three-way interactions between the main effects. It was concluded that layers in shallow cages consumed more feed than required, gained an unnecessary amount of body weight and did not lay compensatory extra eggs. Feeding twice a day to provide continuity of supply may have stimulated layers in deep cages to consume enough food to equal the net egg returns of those in shallow cages. Possible reasons for the differences between the results at this station and elsewhere were also discussed.

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“…I 979) , the tests were: conducted under as near practical conditionsr as possible. ln contrast, the layers in the experiments of Lee ( 1978), Robinson ( 1979) and Hill and Hunt (1978) …”

Section: Specific Gravity and Eggshell Breakagementioning

confidence: 99%

“…ln consequence only the three birds per cage in the R cages laid eggs which were significantly heavier over the l5 laying periods ( Hill and Hunt (1978) and in this exoeriment.…”

Section: Egg Weightmentioning

confidence: 99%

Section: Feed Consumptionmentioning

confidence: 99%

Section: Egg Productionmentioning

confidence: 99%

Section: Specific Gravity and Eggshell Breakagementioning

confidence: 99%

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