Tiny dog, big trouble: Chihuahua health issues grow

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The Chihuahua may be the world’s smallest dogs, but the breed’s popularity is growing – as well as its health issues. And the two things are linked, according to the latest research by the Royal Veterinary College (RVC).

The research, led by the Royal Veterinary College’s (RVC) VetCompass™ programme, revealed that Chihuahua ownership in the UK has increased over five-fold in the past decade from. However, this sharp rise brings potential problems associated with “impulse purchasing, low-welfare breeding at the huge scale to meet consumer demand, legal and illegal importation of puppies, high levels of relinquishment to rescue charities and treating puppies as disposable commodities“.

Chihuahua, Cane, Capelli Lunghi Della Chihuahua

Dr Dan O’Neill, senior lecturer at the RVC and author of the paper, said, “Chihuahuas are an old breed but the recent craze for them can cause some real welfare issues for this tiny dog. There is increasing evidence that unscrupulous breeders and dealers both inside and outside the UK are cashing in on this trend by making a lot of money but with little regard for the welfare of these puppies and breeding bitches.

“Owning a dog is a long-term commitment and I would urge anyone thinking about buying a Chihuahua to really consider and prioritise the needs of the dog before making any final purchasing decisions.”

The most common health concerns of Chihuahuas were dental disease (13.5 per cent), obesity (5.9 per cent) and retained baby teeth (5.7 per cent). The breed was also revealed to be more prone to aggression (4.2 per cent), slipping kneecap (4 per cent) and retained testicles (3.9 per cent).

Camilla Pegram, VetCompass™ epidemiologist at the RVC and co-author of the paper, added, “Dental disease and retained baby teeth should be recognised as important health concerns for Chihuahuas, with preventative care for dental disease a key topic for discussion between vets and owners.

“In addition, many of the common or predisposed disorders, such as dental disease, retained baby teeth, sliding kneecap and retained testicle(s), often require surgical intervention. The Chihuahua’s small size increases its anaesthetic risk.

“Obesity has many detrimental effects, including increased anaesthetic risk, and aggression makes them challenging patients and pets, therefore nutrition, lifestyle and behaviour are also key areas for veterinary-owner discussions.”

Other key findings of the researchers include:

  • Males are more likely than females to show aggression, heart murmur, ear infection, conjunctivitis and upper respiratory tract infection. There were no disorders that were more common in females.
  • The average adult Chihuahua bodyweight was 3.4kg.
  • The average Chihuahua lifespan was 8.2 years. Females (10.2 years) generally outlived males (6.9 years).
  • The most common causes of Chihuahua deaths were heart disease (18.8 per cent), lower respiratory tract disorder (16.3 per cent) and traumatic injury (13.8 per cent).

Bill Lambert, Head of Health and Welfare at the Kennel Club, commented, “This research, supported by the Kennel Club Charitable Trust, enables us and all those who care about the health of Chihuahuas to know and understand more about breed-specific issues.

“The findings will feed into the breed’s Health and Conservation Plans which enables the Kennel Club to identify and monitor each individual breed’s health issues and provide an action plan on how to address these, and continue to improve health.”

chihuahua puppy

He continued, “This paper also illustrates that there are increasing numbers of Chihuahuas bred outside the Kennel Club’s sphere of influence as their popularity grows, often with little regard for health and welfare.

“We continue to urge all puppy buyers to make responsible decisions, seek out a good, caring breeder, who prioritises health, such as a Kennel Club Assured Breeder, and fully research their preferred breed, including any health considerations.

“This plays an important part in improving the health and welfare of all breeds, now and in generations to come.”

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