Pembroke Welsh Corgi nutrition, weight and back health

For a Pembroke Welsh Corgi, most feeding decisions come down to body weight. The breed combines a long back, short legs and a strong appetite, and extra weight on that frame raises the risk of disc problems and shortens life. The American Kennel Club gives adult weight as up to 30 pounds (13.6 kg) for males and up to 28 pounds (12.7 kg) for females, with a life expectancy of 12 to 13 years, and notes that some dogs are prone to becoming overweight.

Why weight matters so much for a Corgi

Short legs come from a form of chondrodysplasia, and many breeds built "long and low" also have discs that degenerate early. When a degenerated disc extrudes into the spinal canal it can cause back pain, a wobbly or weak gait, or sudden paralysis of the hind legs.

A UK referral-hospital study measured 700 dogs of many breeds and found that a longer back relative to height increased the risk of thoracolumbar disc extrusion, and so did being overweight. Corgis were not analyzed as a separate breed, but the finding matters for any dog with this shape. An owner cannot change a dog's back length. Body weight is the part that can be controlled.

Weight also affects lifespan. In a North American study of more than 50,000 neutered pet dogs in 12 breeds, dogs that were overweight in middle age had a shorter median lifespan than dogs in normal condition in every breed studied. The gap ranged from about 5 months in German Shepherds to about 2.5 years in Yorkshire Terriers. No Corgi-specific figure is available, but the direction was the same in every breed covered.

Calorie needs

The Merck Veterinary Manual estimates daily energy from the resting energy requirement (RER), which is 70 times body weight in kilograms to the power 0.75. It multiplies RER by 1.8 for an intact adult, 1.6 for a neutered adult and 1.4 for a dog prone to obesity. Puppies get 3 times RER until four months and 2 times RER after that.

Figures are rounded to the nearest 5 kcal and are only a starting point. The AKC says Corgis benefit from moderate daily exercise, and a pet Corgi that gets only that much may need one of the lower columns. Weigh the dog every two to four weeks at first and adjust the ration by about a tenth at a time.

After neutering

Merck's factors put a neutered adult at about 11% fewer calories than an intact one (1.6 versus 1.8 times RER). Dogs can gain weight in the months after surgery if the ration stays the same. Recheck body condition every couple of weeks for the first few months and trim meals as soon as the waist starts to fill in, rather than waiting for the scale to show a big change.

Protecting the back

Diet cannot change a dog's discs, and no supplement has been shown to prevent disc disease. Lean body weight is the dietary measure with evidence behind it. Around the house, ramps or steps onto sofas and beds and a lead clipped to a chest strap rather than a neck collar are sensible, widely used precautions for long-backed dogs.

Know the warning signs. A Corgi that yelps when picked up, hunches its back, is reluctant to climb stairs or jump, or knuckles or drags its hind feet needs to see a vet the same day. Sudden inability to walk is an emergency, because the outcome of disc extrusion can depend on how quickly treatment starts.

Fish oil (a source of the omega-3 fats EPA and DHA) and glucosamine are often suggested for back and joint health. Evidence that they protect discs is limited. They are better discussed with the vet than added by default.

Hip dysplasia and degenerative myelopathy

The AKC lists hip and elbow dysplasia, eye disorders, cardiac issues, degenerative myelopathy and von Willebrand's disease (a bleeding disorder) among the conditions breeders should screen for. For hip dysplasia the dietary advice is the same as for the spine: keep the dog lean, and ask the breeder for the parents' hip results.

Degenerative myelopathy (DM) is a progressive disease of the spinal cord. The gene behind it was found by studying Pembroke Welsh Corgis: having two copies of a mutation in the SOD1 gene was associated with DM in the Corgi and four other breeds. Signs usually begin at 8 years or older with a wobbly, uncoordinated gait in the hind legs, and over time the weakness spreads forward. It is typically not painful, which helps a vet tell it apart from disc disease, although the two can look alike and need proper investigation.

• DNA testing: a test shows whether a dog carries no copies, one copy or two copies of the mutation. Two copies means the dog is at risk, not that it will certainly develop the disease. Breeders use the result to avoid producing at-risk puppies.
• Diet: no food or supplement has been proven to slow DM. Vitamin E and other antioxidants are sometimes tried; evidence is limited, so use them only with the vet's advice.
• Body weight and muscle: as the hind legs weaken, a lean dog is easier to support and moves better. Regular controlled exercise helps maintain muscle; the vet or a rehabilitation therapist can suggest a program.

Practical feeding for a food-driven herder

• Weigh meals on a kitchen scale. For a dog needing only a few hundred grams of food a day, small errors with a scoop add up.
• Two meals a day suit most adults. Some dogs do better on three smaller meals with the same daily total.
• Slow the eating with a puzzle feeder or scatter feeding, which also gives a herding dog something to do.
• Count treats in the daily total, and keep them to about 10% of calories. Pieces of the day's kibble work as training rewards.
• No table scraps. A Corgi's interest in food is not a sign of hunger.
• For weight loss, ask the vet about a diet designed for it. Cutting an ordinary food far below the feeding guide can leave a dog short of protein, vitamins and minerals.

Sources

1. Pembroke Welsh Corgi dog breed information. American Kennel Club.
2. How long and low can you go? Effect of conformation on the risk of thoracolumbar intervertebral disc extrusion in domestic dogs. PLoS One, 2013.
3. Association between life span and body condition in neutered client-owned dogs. Journal of Veterinary Internal Medicine, 2019.
4. Nutritional requirements of small animals. Merck Veterinary Manual.
5. Genome-wide association analysis reveals a SOD1 mutation in canine degenerative myelopathy that resembles amyotrophic lateral sclerosis. Proceedings of the National Academy of Sciences, 2009.