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Horses’ (Equus Caballus) Laterality, Stress Hormones, and Task Related Behavior in Innovative Problem-Solving

1
Department of Veterinary Sciences, Faculty of Veterinary Medicine, Animal Hygiene and Animal Husbandry, Chair of Animal Welfare, Ethology, Ludwig Maximilian University Munich, Veterinaerstr 13/R, 80539 Munich, Germany
2
Department Equine Economics, Economics and Management, Faculty Agriculture, Nuertingen-Geislingen University, Neckarsteige 6-10, 72622 Nuertingen, Germany
3
Zoology/Evolutionary Biology, University of Regensburg, Universitaetsstraße 31, 93053 Regensburg, Germany
*
Author to whom correspondence should be addressed.
Animals 2019, 9(5), 265; https://doi.org/10.3390/ani9050265
Received: 2 March 2019 / Revised: 17 April 2019 / Accepted: 18 May 2019 / Published: 22 May 2019
(This article belongs to the Section Equids)
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Simple Summary

In order to ensure species-appropriate horse keeping and management, knowledge about horses’ cognitive abilities is essential. One parameter used to measure the cognitive abilities of a species is their capacity for innovative behavior. In this study 16 horses where confronted with a novel problem, i.e., an unknown feeder. When a horse emptied the feeder completely it was considered to be innovative. We found 25% of the horses to be innovative. Horses’ propensity to innovate was mediated by individual behavioral differences and former life experiences. We conclude that horses’ keeping conditions and welfare may be improved by environmental enrichment which promotes the development of innovative behavior.

Abstract

Domesticated horses are constantly confronted with novel tasks. A recent study on anecdotal data indicates that some are innovative in dealing with such tasks. However, innovative behavior in horses has not previously been investigated under experimental conditions. In this study, we investigated whether 16 horses found an innovative solution when confronted with a novel feeder. Moreover, we investigated whether innovative behavior in horses may be affected by individual aspects such as: age, sex, size, motor and sensory laterality, fecal stress hormone concentrations (GCMs), and task-related behavior. Our study revealed evidence for 25% of the horses being capable of innovative problem solving for operating a novel feeder. Innovative horses of the present study were active, tenacious, and may be considered to have a higher inhibitory control, which was revealed by their task related behavior. Furthermore, they appeared to be emotional, reflected by high baseline GCM concentrations and a left sensory and motor laterality. These findings may contribute to the understanding of horses’ cognitive capacities to deal with their environment and calls for enriched environments in sports and leisure horse management. View Full-Text
Keywords: innovative behavior; brain lateralization; glucocorticoid metabolites; behavioral traits; equine cognition innovative behavior; brain lateralization; glucocorticoid metabolites; behavioral traits; equine cognition
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Esch, L.; Wöhr, C.; Erhard, M.; Krüger, K. Horses’ (Equus Caballus) Laterality, Stress Hormones, and Task Related Behavior in Innovative Problem-Solving. Animals 2019, 9, 265.

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