The price of cute: Navigating hereditary diseases and extreme conformations in pets

SINGAPORE – Walk down any popular weekend spot in Singapore, from East Coast Park to the cafes of Tiong Bahru, and you will see them: flat-faced French bulldogs sporting stylish harnesses, sausage-shaped dachshunds trotting along the pavements and striking Scottish fold cats peering out of stroller windows.

There is no denying the appeal of these pedigree companions. However, as veterinary professionals, we are increasingly treating the unintended consequences of this demand for specific aesthetics.

Many of these most beloved breeds are prone to hereditary diseases – conditions passed down through their DNA – and extreme conformations. “Conformation” refers to a pet’s physical shape and structure. When features are bred to the extreme, such as ultra-short noses or excessively long spines, a pet’s health and quality of life can be severely compromised.

The reality of the flat-faced trend

Brachycephalic pets – those with shortened, flat faces like pugs, French bulldogs, British bulldogs and Persian cats – are incredibly popular in Singapore. Unfortunately, their cute, squashed faces come at a high cost to their health.

In brachycephalic dogs, the shortened skull does not leave enough room for internal soft tissues. This results in brachycephalic obstructive airway syndrome. Essentially, their airways are crowded; they have narrowed nostrils and an elongated soft palate (the floppy tissue at the back of the mouth) that partially blocks the windpipe.

In Singapore’s hot, humid climate, this makes breathing an uphill battle and these dogs are extremely prone to heat stroke.

This respiratory struggle often triggers gastrointestinal issues, specifically chronic regurgitation. This is the effortless bringing up of undigested food or white foam, distinct from active vomiting. The intense negative pressure created when these dogs gasp for air acts like a vacuum, pulling stomach contents back up the food pipe.

Furthermore, their shallow eye sockets cause their eyes to bulge. This exposes the cornea to injury, making it highly susceptible to painful corneal ulcers – scratches or open sores on the surface of the eye that can quickly lead to blindness if left untreated.

Flat-faced cats, such as Persians and exotic shorthairs, face identical structural hurdles. Their squashed nasal passages lead to poor drainage, making them prone to recurrent cat flu and chronic upper respiratory signs like wheezing and sneezing.

Their shortened faces also deform the tear ducts, causing tears to overflow constantly onto the face. This leads to chronic skin staining, inflammation and recurring eye problems.

Spines, joints and folded ears

Physical exaggerations also wreak havoc on the musculoskeletal systems of several popular breeds.

The dachshund, alongside the French bulldog and Welsh corgi, is famously predisposed to intervertebral disc disease (IVDD). This is a condition where the cushioning discs between the spinal bones undergo premature ageing and rupture or slip out of place.

As these breeds have been bred to have disproportionately long backs and short legs, their spines are subject to immense mechanical stress. A slipped disc can cause excruciating pain and, in severe cases, sudden and permanent paralysis of the hind legs.

In the feline world, the Scottish fold is loved for its forward-folding ears. However, few owners realise that the genetic mutation responsible for those cute ears is actually a systemic defect in cartilage development.

This condition, called osteochondrodysplasia, affects every single joint in a Scottish fold’s body. As the cat ages, this defective cartilage causes the rapid development of severe, progressive arthritis.

Affected cats live in chronic pain, often becoming stiff and reluctant to jump, and may spend more time hiding or sleeping and less time interacting.

Hearts, hormones and windpipes

Not all hereditary conditions are visible on the outside.

Large, majestic cat breeds like Maine coons and ragdolls carry genetic predispositions for hypertrophic cardiomyopathy. This is a silent, progressive disease where the heart muscle thickens abnormally, reducing the heart’s efficiency. Over time, it can lead to sudden heart failure or life-threatening blood clots.

In dogs, poodles and poodle crosses, such as cavapoos, cockapoos and labradoodles, are uniquely predisposed to Addison’s disease (hypoadrenocorticism).

This occurs when the adrenal glands fail to produce vital hormones that manage stress and electrolyte balance. Because its initial symptoms – lethargy, intermittent diarrhoea and poor appetite – mirror standard stomach bugs, it is often misdiagnosed until the dog falls into a life-threatening “Addisonian crisis”.

On the smaller end of the scale, Yorkshire terriers and pomeranians frequently suffer from tracheal collapse. The trachea, or windpipe, is held open by rings of cartilage.

In these toy breeds, the cartilage rings can be genetically weak, causing the windpipe to flatten out like a floppy straw when the dog breathes quickly or gets excited. This results in a distressing, chronic “honking” cough and breathing difficulties.

Joint dysplasia and the impact of weight

Medium- to large-breed dogs, including labrador retrievers, golden retrievers, German shepherds and rottweilers, are genetically predisposed to hip and elbow dysplasia. These terms describe a malformation of the joints where the bones do not fit together smoothly. Instead of gliding, they grind, leading to early-onset osteoarthritis and lameness.

The single most crucial factor within an owner’s control is weight management. Carrying excess body weight puts immense, unnecessary mechanical strain on already compromised joints, accelerating cartilage breakdown and dramatically increasing pain levels.

Actionable advice for pet owners

If you already own one of these breeds or are planning to take one home, you can take immediate action to protect its health.

Manage the environment: Keep brachycephalic breeds and tracheal collapse sufferers in cool environments during the hottest parts of the day. Limit outdoor exercise to early morning or night – remember, heatstroke kills. Use a harness instead of a collar to avoid placing any pressure on the windpipe.

Modify activities: For breeds prone to IVDD, place ramps next to sofas and beds. Prevent them from jumping on or off furniture, as the impact can trigger a disc rupture. Avoiding excess weight reduces the chances of a slipped disc and the potential need for expensive spinal surgery.

Prioritise weight control: Dogs of all breeds which are overweight by the time they reach middle age live shorter lives compared with those reaching middle age at a healthy weight. Setting aside lifespan, many health issues can be worsened by weight gain. Keep medium- and large-breed dogs lean to prevent pain from arthritis.

For brachycephalic dogs and those at risk of IVDD, being overweight increases the risk of life-threatening breathing difficulties or paralysis, and maintaining a healthy weight reduces the chances of future surgery being needed. Work closely with your vet on precise nutritional plans.

Screen early: If you own a Maine coon, ragdoll or poodle cross, ask your veterinarian about preventative screening, such as cardiac ultrasounds or routine blood panels.

Research before you choose

The most powerful tool for improving animal welfare is owner education. Before adopting or purchasing a pet, it is vital to research the specific health challenges associated with the breed.

For feline enthusiasts, the International Cat Care website (icatcare.org) provides an invaluable, scientifically backed library detailing breed-related diseases and welfare guidelines.

For canine lovers, The Kennel Club website offers comprehensive breakdowns of breed-specific health issues.

By educating yourself and prioritising health over a specific aesthetic trend, you can steer demand back towards healthy, functionally sound companions, ensuring your pet lives a long, pain-free life by your side.