Selection for Short-Nose and Small Size Creates a Behavioural Trade-Off in Dogs

Brachycephalic head shape in dogs has been associated with behavioural traits that may enhance their appeal as companion animals, contributing to their popularity. However, it remains unclear whether these behavioural differences are directly linked to head shape or are mediated by factors such as b...

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Main Authors: Borbála Turcsán, Eniko Kubinyi
Format: Article
Language:English
Published: MDPI AG 2025-07-01
Series:Animals
Subjects:
Online Access:https://www.mdpi.com/2076-2615/15/15/2221
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author Borbála Turcsán
Eniko Kubinyi
author_facet Borbála Turcsán
Eniko Kubinyi
author_sort Borbála Turcsán
collection DOAJ
description Brachycephalic head shape in dogs has been associated with behavioural traits that may enhance their appeal as companion animals, contributing to their popularity. However, it remains unclear whether these behavioural differences are directly linked to head shape or are mediated by factors such as body size, demographics, and dog-keeping practices. Drawing on two large-scale owner surveys (N = 5613) and cephalic index estimates for 90 breeds, we investigated the relationship between head shape and eight behavioural variables (four personality traits and four behavioural problems), while controlling for 20 demographic and dog-keeping characteristics, as well as body size. Our results show that behavioural differences among head shapes are only partly attributable to head shape itself; some are explained by confounding variables. Specifically, brachycephalic dogs appeared predisposed to positive behaviours (e.g., calmness, fewer behavioural problems), but these traits were often obscured by their small body size and low training experience. These findings highlight the complex interplay between morphology, behaviour, and environment, and emphasize the role of training and management in supporting the behavioural well-being of popular brachycephalic breeds. This has important implications for owners, breeders, and welfare professionals aiming to align aesthetic preferences with behavioural and welfare outcomes.
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spelling doaj-art-9f490251e275488b8f5e8bd2e75ffa782025-08-20T03:36:01ZengMDPI AGAnimals2076-26152025-07-011515222110.3390/ani15152221Selection for Short-Nose and Small Size Creates a Behavioural Trade-Off in DogsBorbála Turcsán0Eniko Kubinyi1Department of Ethology, ELTE Eötvös Loránd University, 1117 Budapest, HungaryDepartment of Ethology, ELTE Eötvös Loránd University, 1117 Budapest, HungaryBrachycephalic head shape in dogs has been associated with behavioural traits that may enhance their appeal as companion animals, contributing to their popularity. However, it remains unclear whether these behavioural differences are directly linked to head shape or are mediated by factors such as body size, demographics, and dog-keeping practices. Drawing on two large-scale owner surveys (N = 5613) and cephalic index estimates for 90 breeds, we investigated the relationship between head shape and eight behavioural variables (four personality traits and four behavioural problems), while controlling for 20 demographic and dog-keeping characteristics, as well as body size. Our results show that behavioural differences among head shapes are only partly attributable to head shape itself; some are explained by confounding variables. Specifically, brachycephalic dogs appeared predisposed to positive behaviours (e.g., calmness, fewer behavioural problems), but these traits were often obscured by their small body size and low training experience. These findings highlight the complex interplay between morphology, behaviour, and environment, and emphasize the role of training and management in supporting the behavioural well-being of popular brachycephalic breeds. This has important implications for owners, breeders, and welfare professionals aiming to align aesthetic preferences with behavioural and welfare outcomes.https://www.mdpi.com/2076-2615/15/15/2221doghead shapemanagement characteristicsbody sizebehaviourwelfare
spellingShingle Borbála Turcsán
Eniko Kubinyi
Selection for Short-Nose and Small Size Creates a Behavioural Trade-Off in Dogs
Animals
dog
head shape
management characteristics
body size
behaviour
welfare
title Selection for Short-Nose and Small Size Creates a Behavioural Trade-Off in Dogs
title_full Selection for Short-Nose and Small Size Creates a Behavioural Trade-Off in Dogs
title_fullStr Selection for Short-Nose and Small Size Creates a Behavioural Trade-Off in Dogs
title_full_unstemmed Selection for Short-Nose and Small Size Creates a Behavioural Trade-Off in Dogs
title_short Selection for Short-Nose and Small Size Creates a Behavioural Trade-Off in Dogs
title_sort selection for short nose and small size creates a behavioural trade off in dogs
topic dog
head shape
management characteristics
body size
behaviour
welfare
url https://www.mdpi.com/2076-2615/15/15/2221
work_keys_str_mv AT borbalaturcsan selectionforshortnoseandsmallsizecreatesabehaviouraltradeoffindogs
AT enikokubinyi selectionforshortnoseandsmallsizecreatesabehaviouraltradeoffindogs