Greyhound nutrition: calories, retired racer diets and bloat

Greyhounds are big dogs built with very little fat, and most feeding mistakes come from treating them like any other dog of the same weight. In UK primary-care records, pet greyhounds averaged about 32 kg for males and 27 kg for females. That is Labrador territory on the scale, but a greyhound carries more of that weight as muscle. Many pet greyhounds are retired racers, which adds a diet change and, often, a mouth that needs dental work.

What sets greyhound physiology apart

Energy needs depend on more than body weight. The Merck Veterinary Manual lists the percentage of lean body mass among the factors that set a dog's daily calorie requirement, alongside activity, age, life stage and environment. Muscle costs energy to maintain, so a lean greyhound can need more food than a heavier-set dog of the same weight, and it has less fat to draw on when it eats poorly for a few days.

Low fat also means little insulation. A greyhound kept outdoors or in a cold house spends extra energy staying warm, and a coat indoors in winter is practical rather than decorative. Watch body condition through the cold months and adjust the portion if the ribs and hips start to show more.

Routine blood results differ from other breeds too. A review of greyhound clinical pathology describes higher red cell mass, creatinine and some liver enzyme values, with lower white cell, neutrophil and platelet counts, lower globulins and lower thyroid hormone (T4). Read against general dog reference ranges, a healthy greyhound can appear to have too many red cells, struggling kidneys or an underactive thyroid when it has none of those. A clinic that sees many greyhounds will know this. Elsewhere, it helps to mention it before blood is drawn.

Daily calories and body condition

A standard starting point comes from the Merck Veterinary Manual. Resting energy requirement (RER), in kcal per day, is 70 multiplied by body weight in kilograms raised to the power 0.75. Multiply that by 1.6 for a neutered adult, 1.8 for an intact adult or 1.4 for a dog that gains weight easily. The manual is clear that this is only a starting point, and that one dog may need up to 30% more or less than another of the same weight.

Worked through for typical adult greyhound weights, rounded to the nearest 5 kcal:

For most pet greyhounds, the neutered column is the place to start. Treat the number as a first guess and let the dog correct it. Weigh every two weeks for the first two months on a new food, and look at the dog as well as the scale.

A fit greyhound looks thin to people used to other breeds. The outline of a few ribs is often faintly visible, there is a clear waist, and the muscles over the back and thighs are full. A dog whose spine, hip bones and every rib stand out, or whose thigh and back muscles look hollow, is too thin. Protein matters as much as calories here. A food labeled complete and balanced for adult maintenance, with named animal protein near the top of the ingredient list, is a reasonable default. Treats and chews count toward the day's calories.

Moving a retired racer onto a home diet

Some racing and breeding kennels feed diets built around raw meat. At one US greyhound breeding facility investigated for Salmonella infections, raw meat was the main part of the diet, and it was the likely route by which some of the Salmonella strains reached the dogs. That is a reason to ask the adoption group exactly what the dog was eating and to wash hands and bowls with care if raw feeding continues at home.

Change the food slowly. Mixing a growing share of the new food into the old over one to two weeks gives the gut time to adapt, and a dog that develops loose stools can stay at the current mix for a few more days before moving on. A retired racer usually does far less exercise at home than it did in training, so weight often creeps up in the first months. Some gain is expected in a dog that came off the track very lean. The body condition checks above decide when it has gone far enough.

Diarrhea that lasts more than a day or two, blood in the stool, vomiting or refusal to eat are reasons to call a vet rather than to keep adjusting the food. Newly adopted dogs can carry parasites or infections that look like diet trouble.

Bloat risk and mealtime habits

Gastric dilatation-volvulus (GDV) is a swollen, twisted stomach. It mainly affects large and giant breeds and, according to the Merck Veterinary Manual, at least 20% of treated dogs still die. Greyhounds are not on Merck's list of highest-risk breeds. They do share two features the manual links to GDV: a deep, narrow chest and a lean body condition.

Signs to act on immediately:

• Retching that brings nothing up
• Drooling and restlessness
• A swollen or tight abdomen
• Pale gums, weakness or collapse

A dog with these signs needs an emergency clinic straight away. There is no home treatment.

Habits that lower risk are simple. Split the day's food into two or more meals rather than one. Keep hard exercise away from mealtimes, both before and after. Slow down a fast eater with a puzzle bowl or by scattering kibble. Feed from the floor: in a cohort of large and giant breed dogs, a raised feeding bowl was associated with a higher risk of GDV, as were faster eating and having a close relative with GDV. Many veterinary surgeons offer a preventive gastropexy, which fixes the stomach to the body wall so it cannot twist. It can be done during a spay or neuter, and it is worth asking about for a dog whose relatives have had GDV.

Health problems that change how a greyhound eats

Dental disease

Periodontal disease was the most common disorder recorded in the UK greyhound study, found in 39% of dogs in a single year. Sore teeth and gums make a dog eat slowly, drop food or avoid hard kibble, and weight loss can follow. An adopted greyhound should have its mouth checked early. Daily tooth brushing is the most reliable home care. After extractions, soaked kibble or a wet food keeps intake up while the mouth heals.

Bone cancer

Greyhounds have a high prevalence of osteosarcoma, and neoplasia was the most common cause of death in the UK records. No diet is known to prevent it. What matters for owners is recognizing it early: lameness that does not settle within a few days, or a firm, painful swelling on a leg, needs a vet visit and usually an X-ray.

Anesthesia

Sighthounds handle some anesthetic drugs differently. A review of sighthound anesthesia describes slower breakdown of certain drugs by the liver, with prolonged recovery from thiopental in particular, and a lean shape that makes these dogs lose heat quickly under anesthesia. Modern protocols take this into account, but it is worth confirming that the clinic is used to greyhounds before dental work or surgery. Follow the clinic's fasting instructions exactly, and keep the dog warm on the way home.

Common feeding mistakes

• Feeding to the chart. Pack guides are written for average dogs. A greyhound at the right weight for its frame may need more, and a retired racer settling into a quiet life may need less.
• Aiming for a rounder dog. Visitors often say a healthy greyhound looks too thin. Judge by muscle and the checks above, not by comparison with other breeds.
• One big meal. It is the easiest schedule and the least suited to a large, deep-chested dog.
• Supplements by default. Fish oil and joint products are widely used, but there is no greyhound-specific evidence on dose or benefit. Ask a vet before adding one, especially to a complete food.

Sources

1. Greyhounds under general veterinary care in the UK during 2016: demography and common disorders. Canine Genetics and Epidemiology, 2019.
2. Clinical pathology of Greyhounds and other sighthounds. Veterinary Clinical Pathology, 2011.
3. Nutritional requirements of small animals. Merck Veterinary Manual.
4. Evaluation of the association between feeding raw meat and Salmonella enterica infections at a Greyhound breeding facility. Journal of the American Veterinary Medical Association, 2006.
5. Gastric dilation and volvulus in small animals. Merck Veterinary Manual.
6. Non-dietary risk factors for gastric dilatation-volvulus in large and giant breed dogs. Journal of the American Veterinary Medical Association, 2000.
7. Markers of iron metabolism in retired racing Greyhounds with and without osteosarcoma. Veterinary Clinical Pathology, 2013.
8. Anesthesia of the sighthound. Clinical Techniques in Small Animal Practice, 1999.