Miniature Schnauzer nutrition and low-fat feeding

About one in three healthy Miniature Schnauzers has raised blood triglycerides, and the share climbs with age. In this breed that trait has been linked with pancreatitis, and dietary fat is the part owners control. A Miniature Schnauzer's food is best chosen by its fat content first and its marketing claims last.

High triglycerides in the breed

Triglycerides are the fats that circulate in the blood after a meal and are normally cleared within hours. In many Miniature Schnauzers they stay high even after a fast, with no other disease to explain it. This is called primary or idiopathic hypertriglyceridemia, and it is the most common primary lipid disorder in dogs.

The best prevalence figure comes from a study of 192 healthy Miniature Schnauzers in the United States. Nearly 33% had triglycerides above the reference range, against about 5% of dogs of other breeds, and both the number of affected dogs and the severity rose with age. Cholesterol was a different story. Only 9% of the Schnauzers had high cholesterol, and their average was no different from other dogs, so triglycerides are the number to watch.

A review of canine hyperlipidemia lists its possible complications as pancreatitis, liver disease, atherosclerosis, eye disease and seizures. The same review notes that high blood lipids are more often secondary to something else, including hormonal disorders, pancreatitis, some liver and kidney diseases, obesity and certain medicines. A Schnauzer with a high result needs those causes checked before it is labeled as the breed form.

Pancreatitis

The pancreas makes digestive enzymes and insulin. In pancreatitis, those enzymes activate too early and start to damage the pancreas itself. VCA Animal Hospitals notes that the cause is often unknown, but a fatty meal can trigger some cases.

In Miniature Schnauzers the link with blood fats is measurable. Schnauzers that had recovered from pancreatitis had about five times the odds of high triglycerides of age-matched Schnauzers with no such history (71% against 33%), and their median triglyceride level was roughly eight times higher. That study cannot prove which came first, but it is the main reason fat control sits at the center of feeding this breed.

Signs to act on the same day:

• Repeated vomiting, or vomiting with a refusal to eat
• A painful belly, or the "praying" stance with the chest down and hindquarters raised
• Diarrhea with lethargy or fever
• Weakness or collapse

Mild cases are treated with pain relief, anti-nausea medication and small meals of a low-fat food. Severe cases need fluids and hospital care. According to VCA, repeated or severe episodes can destroy enough of the pancreas to cause exocrine pancreatic insufficiency, where food is no longer digested properly, or diabetes.

Choosing a lower-fat diet

Fat on a label is given "as fed", which makes dry and wet foods hard to compare. Converting to a dry matter basis removes the water: divide the fat percentage by (100 minus the moisture percentage) and multiply by 100. A kibble with 16% fat and 10% moisture works out at about 18% fat on a dry matter basis. A canned food with 5% fat and 78% moisture looks lean on the label but works out at about 23%.

For a Schnauzer with high triglycerides, diet change works. In a clinical trial of 16 affected Miniature Schnauzers, a commercial low-fat diet cut median triglycerides from around 480 mg/dL to under 180 mg/dL within two to three months, and it improved cholesterol and lipoprotein profiles as well. The canine hyperlipidemia review describes ultra low-fat diets as the basis of management, with omega-3 fatty acids or lipid-lowering drugs added in some dogs. The right fat target depends on the blood results, so a dog with a high reading or a history of pancreatitis should have it set by the vet, often with a therapeutic food.

For a Schnauzer with normal results, a complete adult food toward the lower end of the fat range for its category is a sensible default, especially as the dog ages. In practice most of the fat that causes trouble comes from outside the bowl:

• Table food. Bacon, sausage, cheese, butter, meat trimmings, poultry skin and gravy are all high in fat.
• Treats and chews. Some are much richer than the main food. Check the label, and count treats as part of the day's food.
• Lean alternatives. Small pieces of skinless cooked chicken breast, white fish or a portion of the dog's own kibble work as training rewards.

Body weight matters too. Obesity raises blood lipids in its own right, so keep the ribs easy to feel and the waist visible.

Bladder stones

In more than 40,000 canine bladder stones sent to the Canadian Veterinary Urolith Centre over ten years, the Miniature Schnauzer was among the five breeds most often affected by both of the common stone types, struvite and calcium oxalate. Struvite stones were more common in females and calcium oxalate stones in males.

Each type is managed differently, so a removed or passed stone should be sent for analysis. VCA's guide to bladder stones explains that some stones can be dissolved by feeding a prescription diet exclusively, while others need removal by surgery, flushing or a cystoscope. Blood in the urine and straining are the usual signs. A dog, especially a male, that strains without passing urine may have a blocked urethra and needs emergency care.

Whatever the stone type, dilute urine is the common goal. Feeding wet food, adding water to kibble and keeping fresh water easy to reach all increase water intake. Avoid adding mineral or vitamin supplements to a complete diet without advice from the vet.

Diabetes

Miniature Schnauzers are among the breeds at higher risk of diabetes mellitus. In a study of more than 134,000 dogs seen at Australian first-opinion clinics, Miniature Schnauzers had about three and a half times the odds of diabetes of the reference group. Pancreatitis is one route to it, which gives fat control a second purpose.

Early signs are increased thirst, increased urination and weight loss despite a good appetite. A dog with these signs needs a blood and urine glucose test. Once a dog is on insulin, the same food in the same amounts at the same times each day makes the dose easier to match, and any change of food should be agreed with the vet first.

Teeth and chews

Plaque forms on a dog's teeth within days of a cleaning. Daily toothbrushing with a dog toothpaste removes plaque before it hardens into tartar. The Veterinary Oral Health Council lists diets, chews and water additives that have passed its plaque or tartar trials. Its seal says nothing about fat, though, so check the label of any dental chew for a dog on a low-fat plan. Tartar already on the teeth needs a professional cleaning under anesthesia.

Sources

1. Investigation of hypertriglyceridemia in healthy Miniature Schnauzers. Journal of Veterinary Internal Medicine, 2007.
2. Canine hyperlipidaemia. Journal of Small Animal Practice, 2015.
3. Pancreatitis in Dogs. VCA Animal Hospitals, 2026.
4. Serum triglyceride concentrations in Miniature Schnauzers with and without a history of probable pancreatitis. Journal of Veterinary Internal Medicine, 2011.
5. Effect of a low-fat diet on serum triglyceride and cholesterol concentrations and lipoprotein profiles in Miniature Schnauzers with hypertriglyceridemia. Journal of Veterinary Internal Medicine, 2020.
6. Canine and feline urolithiasis: examination of over 50 000 urolith submissions to the Canadian veterinary urolith centre from 1998 to 2008. Canadian Veterinary Journal, 2009.
7. Bladder Stones in Dogs. VCA Animal Hospitals.
8. Epidemiological study of dogs with diabetes mellitus attending primary care veterinary clinics in Australia. Veterinary Record, 2020.