Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016

Abstract Background The Chihuahua, the world’s smallest dog breed, is a popular breed in the UK today. The VetCompass™ Programme collates de-identified clinical records from primary-care veterinary practices in the UK for epidemiological research. This study aimed to characterise the demography, age...

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Main Authors: Dan G. O’Neill, Rowena M. A. Packer, Meghan Lobb, David B. Church, Dave C. Brodbelt, Camilla Pegram
Format: Article
Language:English
Published: BMC 2020-02-01
Series:BMC Veterinary Research
Subjects:
Online Access:https://doi.org/10.1186/s12917-020-2258-1
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author Dan G. O’Neill
Rowena M. A. Packer
Meghan Lobb
David B. Church
Dave C. Brodbelt
Camilla Pegram
author_facet Dan G. O’Neill
Rowena M. A. Packer
Meghan Lobb
David B. Church
Dave C. Brodbelt
Camilla Pegram
author_sort Dan G. O’Neill
collection DOAJ
description Abstract Background The Chihuahua, the world’s smallest dog breed, is a popular breed in the UK today. The VetCompass™ Programme collates de-identified clinical records from primary-care veterinary practices in the UK for epidemiological research. This study aimed to characterise the demography, age at death and common disorders of Chihuahuas under primary veterinary care during 2016 in the UK. Results Chihuahuas comprised 11,647/336,865 (3.46%) dogs under veterinary care during 2016. The annual proportional birth rate for Chihuahuas rose from 1.01% in 2005 to 5.35% in 2016. Median adult bodyweight was 3.4 kg (interquartile range [IQR]: 2.7–4.3, range 0.8–9.8).). Median age was 2.8 years (interquartile range [IQR] 1.6–4.9). Median age at death from this young expanding population was 8.2 years (IQR 3.5–12.1). Females (10.2 years) outlived males (6.9 years) (Mann-Whitney U test: P = 0.005). The most common grouped causes of death were heart disease (18.8%, 95% CI: 10.9–29.0), lower respiratory tract disorder (16.3%, 95% CI: 8.9–26.2) and traumatic injury (13.8%, 95% CI: 7.1–23.3). The most common specific disorders were periodontal disease (13.5%, 95% CI: 12.6–14.4), obesity (5.9%, 95% CI: 5.3–6.5), retained deciduous dentition (5.7%, 95% CI: 5.1–6.4), anal sac impaction (4.9%, 95% CI: 4.4–5.5) and aggression (4.2%, 95% CI: 3.7–4.8). Among the 28 most common fine-level disorders, males had statistically (P <  0.005) higher probability than females for 5 disorders (aggression, heart murmur, otitis externa, conjunctivitis and upper respiratory tract infection). There were no disorders with statistically (P <  0.005) higher prevalence in females. Conclusions This study documented rising ownership and a currently youthful population of Chihuahuas in the UK. These results suggest that the Chihuahua is currently undergoing a popularity boom but veterinarians need to be watchful for welfare issues related to impulse purchase of Chihuahua puppies by owners with limited experience of dog care. Periodontal disease, obesity, retained deciduous dentition, anal sac impaction and aggression were identified as common health issues within the breed. The unique veterinary care needs of this popular miniature breed suggest that veterinarians should consider the value of advanced training in anesthesia and dentistry in small-sized dogs.
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spelling doaj.art-beb0b8f4652a4523aaa192454c2c70462022-12-21T19:49:26ZengBMCBMC Veterinary Research1746-61482020-02-0116111410.1186/s12917-020-2258-1Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016Dan G. O’Neill0Rowena M. A. Packer1Meghan Lobb2David B. Church3Dave C. Brodbelt4Camilla Pegram5Pathobiology and Population Science, The Royal Veterinary CollegeClinical Science and Services, The Royal Veterinary CollegePathobiology and Population Science, The Royal Veterinary CollegeClinical Science and Services, The Royal Veterinary CollegePathobiology and Population Science, The Royal Veterinary CollegePathobiology and Population Science, The Royal Veterinary CollegeAbstract Background The Chihuahua, the world’s smallest dog breed, is a popular breed in the UK today. The VetCompass™ Programme collates de-identified clinical records from primary-care veterinary practices in the UK for epidemiological research. This study aimed to characterise the demography, age at death and common disorders of Chihuahuas under primary veterinary care during 2016 in the UK. Results Chihuahuas comprised 11,647/336,865 (3.46%) dogs under veterinary care during 2016. The annual proportional birth rate for Chihuahuas rose from 1.01% in 2005 to 5.35% in 2016. Median adult bodyweight was 3.4 kg (interquartile range [IQR]: 2.7–4.3, range 0.8–9.8).). Median age was 2.8 years (interquartile range [IQR] 1.6–4.9). Median age at death from this young expanding population was 8.2 years (IQR 3.5–12.1). Females (10.2 years) outlived males (6.9 years) (Mann-Whitney U test: P = 0.005). The most common grouped causes of death were heart disease (18.8%, 95% CI: 10.9–29.0), lower respiratory tract disorder (16.3%, 95% CI: 8.9–26.2) and traumatic injury (13.8%, 95% CI: 7.1–23.3). The most common specific disorders were periodontal disease (13.5%, 95% CI: 12.6–14.4), obesity (5.9%, 95% CI: 5.3–6.5), retained deciduous dentition (5.7%, 95% CI: 5.1–6.4), anal sac impaction (4.9%, 95% CI: 4.4–5.5) and aggression (4.2%, 95% CI: 3.7–4.8). Among the 28 most common fine-level disorders, males had statistically (P <  0.005) higher probability than females for 5 disorders (aggression, heart murmur, otitis externa, conjunctivitis and upper respiratory tract infection). There were no disorders with statistically (P <  0.005) higher prevalence in females. Conclusions This study documented rising ownership and a currently youthful population of Chihuahuas in the UK. These results suggest that the Chihuahua is currently undergoing a popularity boom but veterinarians need to be watchful for welfare issues related to impulse purchase of Chihuahua puppies by owners with limited experience of dog care. Periodontal disease, obesity, retained deciduous dentition, anal sac impaction and aggression were identified as common health issues within the breed. The unique veterinary care needs of this popular miniature breed suggest that veterinarians should consider the value of advanced training in anesthesia and dentistry in small-sized dogs.https://doi.org/10.1186/s12917-020-2258-1VetCompassElectronic patient recordEPRBreedDogEpidemiology
spellingShingle Dan G. O’Neill
Rowena M. A. Packer
Meghan Lobb
David B. Church
Dave C. Brodbelt
Camilla Pegram
Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016
BMC Veterinary Research
VetCompass
Electronic patient record
EPR
Breed
Dog
Epidemiology
title Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016
title_full Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016
title_fullStr Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016
title_full_unstemmed Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016
title_short Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016
title_sort demography and commonly recorded clinical conditions of chihuahuas under primary veterinary care in the uk in 2016
topic VetCompass
Electronic patient record
EPR
Breed
Dog
Epidemiology
url https://doi.org/10.1186/s12917-020-2258-1
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