between isu & icf constant open door (cod) vs. part-time ... study summr… · constant open...

Personal background

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Assessing production and well-being responses of laying hens in aviary housing to management practices – A collaborative study

between ISU & ICF

Constant Open Door (COD) vs. Part-time Open Door

(POD) with or w/o Experienced Hens in Aviary House

3 m

2.5

m

1.8 m

12

3

5

8

10

7

11

6

4

1 Nest area

2 Egg belt

3 Nipple drinker

4 Folding grill door

5 Perches

6 Sliding door

7 Cage gate

8 Feeders

9 Air duct

10 Manure belt

911 litter floor

Jofran Oliveira & Dr. Hongwei Xin (ISU); Darrin Eckard & Dr. Craig Rowles (ICF)

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Objectives and Hypothesis of the Study

Objectives

1) Assess the effect of daily part-time system door closure on hens

2) Assess the effect of introducing experienced hens in a new flock

Hypotheses

1) Daily part-time closure does not compromise hen well-being or performance while enhancing nest-training and reducing floor eggs.

2) Introducing experienced hens to new flock may “teach” pullets in using nest box, hence reducing floor eggs.

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Methodology: Treatment Assignments

• R = Row, S = Section

• Small sections = 857 birds, Large sections = 1,714 birds

• Lights on at 5:15 h, POD open doors at 10:50 h, Lights off (POD doors closed) at 21:00 h

• Study started: 11/27/16 (birds at 17 WOA). Results to date: 08/30/17 (birds at 55 WOA)

End sections not used

Constant open door with experienced hens

Constant open door w/o experienced hens

Part-time open door with experienced hens

Part-time open door w/o experienced hens

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Results to Date (19-55 WOA): Floor eggs

0

1000

2000

3000

4000

5000

6000

7000

8000

Cumulative (COD - Open) Cumulative (POD - Part time)

Cu

mu

lati

ve f

loo

r e

ggs

pe

r 1

00

0

bir

ds

ho

use

d

Reduction of 84 %

Constant Open Door (COD) Part-time Open Door (POD)

6,300

1,035

0

0.05

0.1

0.15

0.2

COD - Open POD - Part time

Bir

ds

ou

tsid

e s

yste

m a

t n

igh

t (%

)

Reduction of 84 %

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Results to Date: Hens outside system at night

Constant Open Door (COD) Part-time Open Door (POD)

0.067

0.011

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Results to Date: Body weight

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

COD-E(Open/Experienced)

COD-P (Open/Pullets) POD-E (Parttime/Experienced)

POD-P (Parttime/Pullets)

Bo

dy

We

igh

t(l

b)

COD + EH COD - EH POD - EHPOD + EH

3.4 3.4 3.3 3.3

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Results to Date: BW uniformity

0

10

20

30

40

50

60

70

80

90

100

COD-E(Open/Experienced)

COD-P (Open/Pullets) POD-E (Parttime/Experienced)

POD-P (Parttime/Pullets)

Un

ifo

rmit

y (%

)


83.1 84.9 86.7 84.9

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Results to Date: Cumulative mortality

0

1

2

3

4

5

6

7

8

Cum_COD-E Cum_COD-P Cum_POD-E Cum_POD-P

Cu

mu

lati

ve m

ort

alit

y ra

te (

%)


5.9

4.6

5.6 5.6

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Results to Date: Litter accumulation on floor

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

1 2

Litt

er

rem

ove

d (

lb/1

00

he

ns/

day

)

1st Removal (April 12, 2017) – Cold Weather

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

1 2Li

tte

r re

mo

ved

(lb

/10

0 h

en

s/d

ay)

2nd Removal (August 13, 2017) – Warm Weather

Reduction of 63 % as is and 51% dry basis by POD

Reduction of 49 % as is and 40 % dry basis by POD

Dry

Dry Dry

Dry

Constant Open Door (COD) Part-time Open Door (POD) Constant Open Door (COD) Part-time Open Door (POD)

4.9

2.6

1.81.3

3.8

2.8

1.9 1.7

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Results to Date: Litter moisture content

0.0

10.0

20.0

30.0

40.0

50.0

60.0

1 2Li

tte

r m

ois

ture

co

nte

nt

(%)

2nd Removal (August 13, 2017) – Warm Weather

0.0

10.0

20.0

30.0

40.0

50.0

60.0

1 2

Litt

er

mo

istu

re c

on

ten

t (%

)

1st Removal (April 12, 2017) – Cold Weather


44.9

28.5 28.1

15.2

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Results to Date: Litter floor access

0

2

4

6

8

10

12

14

16

18

20

12

AM

1 A

M

2 A

M

3 A

M

4 A

M

5 A

M

6 A

M

7 A

M

8 A

M

9 A

M

10

AM

11

AM

12

PM

1 P

M

2 P

M

3 P

M

4 P

M

5 P

M

6 P

M

7 P

M

8 P

M

9 P

M

10

PM

11

PMNo

. of

bir

ds

view

ed

in IR

imag

e

Time of day

COD

POD

Time: 10:49:45 AM

Time: 10:50:00 AM

Time: 10:50:15 AM

Time: 10:50:30 AM

Time: 10:50:45 AM

Time: 10:52:00 AM

Time: 10:55:00 AM

Time: 11:06:00 AM

Time: 11:30:00 AM

Time: 07:14:45 PM

Time: 07:30:15 PM

Time: 07:55:00 PM

Time: 08:55:00 PM

Time: 08:57:00 PM

Time: 08:59:00 PM

Time: 09:01:00 PM

Time: 09:01:15 PM

Time: 09:01:30 PM

Time: 10:49:45 AM

Time: 10:50:00 AM

Time: 10:50:15 AM

Time: 10:50:30 AM

Time: 10:50:45 AM

Time: 10:52:00 AM

Time: 10:55:00 AM

Time: 11:06:00 AM

Time: 11:30:00 AM

0

1

2

3

4

5

1 2Li

tte

r d

ep

th (

in)

Mean Max Min

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Results to Date: Ammonia level

0

5

10

15

20

25

30

35

40

1 2

Am

mo

nia

co

nce

ntr

atio

n (

pp

m)

Mean Max Min


34

10

24

8

4.2

1.41.1

0.5

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Take-Home Messages (to date)

1) Continuous access to litter, as compared to part-time access (i.e., after peak lay in the morning), has:

a) much more floor eggs

b) much more litter on floor, caking

c) higher ammonia levels

d) No difference in body weight or uniformity

2) Introducing “older hens” seems to have no effect.

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Future Plan

Continue data collection till end of the flock1)

Collect welfare data near end of the flock2)

Conduct more detailed data analysis3)

Disseminate study results through conference presentations, 4)EIC Forum, peer-review journal publications

15

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April 16-18, 2018

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between isu & icf constant open door (cod) vs. part-time ... study summr… · constant open...

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