Evidence map›Paper›PMID 37443872›Full record

ArticleAnimals : an open access journal from MDPI2023

Environmental Complexity and Reduced Stocking Density Promote Positive Behavioral Outcomes in Broiler Chickens.

Lauren Evans, George C Brooks, Mallory G Anderson, Andrew M Campbell, Leonie Jacobs

Abstract read
In one paragraph

Article in Animals : an open access journal from MDPI, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Assessing and Improving Animal Welfare Using Applied Ethology.Animals : an open access journal from MDPI · 2025
    Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Laying Hens: Why Smothering and Not Surviving?-A Literature Review.Animals : an open access journal from MDPI · 2024
    Review
  13. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Lauren EvansVirginia Tech, School of Animal Sciences, 175 West Campus Drive, Blacksburg, VA 24061, USA.
George C BrooksVirginia Tech, Department of Fish and Wildlife Conservation, 310 West Campus Drive, Blacksburg, VA 24061, USA.ORCID 0000-0001-9006-6465
Mallory G AndersonVirginia Tech, School of Animal Sciences, 175 West Campus Drive, Blacksburg, VA 24061, USA.
Andrew M CampbellVirginia Tech, School of Animal Sciences, 175 West Campus Drive, Blacksburg, VA 24061, USA.
Leonie JacobsVirginia Tech, School of Animal Sciences, 175 West Campus Drive, Blacksburg, VA 24061, USA.ORCID 0000-0002-3799-5078

Funding

Poultry Science Association Arthur W. Perdue Fellowship
6 · The paper itself

Abstract

The objective was to evaluate the impacts of a complex environment and stocking density on Ross 708 broiler chicken behaviors. Eight pens contained either high complexity (HC) or low complexity (LC) environments, and high (HD) or low (LD) density. Through focal-animal sampling, the frequency and duration of behaviors were recorded continuously for 5 min at two timepoints for one day in weeks 2, 4, and 7. Birds were active for 30% of the observed time, with birds showing more activity in HC compared with LC. Birds in HC pens spent more time preening and foraging than birds in LC pens, which was interpreted as a positive outcome. Dustbathing and play were not impacted by complexity, possibly due to the observation method. Birds were more frequently active at HD compared with LD, but did not spend more time being active, suggesting disturbances. Birds foraged, drank, and ate less frequently in HD compared with LD, presumably because birds had more difficulty accessing resources. Activity and active behaviors reduced as birds aged, while preening frequency increased, possibly due to frustration, but this was not confirmed. Perching was unaffected by age, showing a persistent motivation to perform the behavior. Our results indicate that a complex environment provides positive stimulation for foraging, locomotion, preening, and overall activity. Despite reduced activity, many benefits of the tested environmental complexity and low density persisted as birds aged.

Indexed as

animal welfarebehaviorbroiler chickenenvironmental enrichmentethologystocking density

Identifiers

PMID37443872
PMCPMC10339985

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.