Supplement Priorities & Categories: Where Nutraceuticals Fit Into Your Pet’s Plan

As an integrative veterinarian, one of the most common questions I hear from pet parents is: “Does my pet need a supplement?” My answer is almost always the same: maybe, but probably not the one you think. Supplements can be incredibly valuable tools when used strategically, but they’re not shortcuts to health, and more isn’t better.

A cabinet full of powders, oils, chews, and capsules doesn’t automatically make a pet healthier. In fact, adding too many products too quickly can create confusion, unnecessary expense, digestive upset, nutrient excesses, and make it difficult to know what’s actually helping.

Support should always be intentional and layered. First, we build the foundation: species-appropriate nutrition, healthy body composition, restorative sleep, movement, emotional wellbeing, and environmental balance. Then we ask whether targeted support could help improve quality of life, reduce risk, or strengthen resilience.

The goal of this guide isn’t to convince you that every pet needs supplements. It’s to help you understand when supplements make sense, how to prioritize them, and how to build a plan that supports your individual pet instead of chasing trends. Whether your companion is dealing with arthritis today, carries a genetic predisposition, or you want to provide foundational support as they age, the right supplement at the right time can make a noticeable difference.

The Order of Priority: Where to Start

When more than one supplement could help your pet, you can't (and shouldn't) start them all at once. Budgets are real, pets get pill fatigue, and the golden rule of introducing one supplement at a time means you're working in sequence anyway. So triage by impact.

Address your pet's needs in this order:

First: Supplements for current issues and quality of life. Start with anything affecting how your pet feels and functions today: diagnosed conditions and active symptoms such as:

• Pain
• Stiffness
• Itching
• Digestive upset
• Declining mobility
• Cognitive changes

Within this first tier, line things up from the most life-threatening condition to the least, then add the supplements that most improve day-to-day comfort and quality of life. These are the changes your pet will feel the fastest, so they earn the top spot.

Second: Supplements for genetic predispositions. Once current problems are well supported, turn to known risks your pet hasn't developed yet: DNA test results, breed-specific vulnerabilities, and large- or giant-breed joint risk. A predisposition is not a diagnosis; it's a head start. This is the moment to down-regulate epigenetics and support the body before a condition has a chance to take hold.

Third: Supplements for general wellbeing. Last come the broad, preventive, longevity-minded supplements that benefit almost any pet; things like omega-3 fatty acids and antioxidants for whole-body health. These are valuable, but they belong after the higher-priority needs are covered, not instead of them.

A quick way to remember supplement priority: treat what's happening now, then protect against what's likely to happen, then support everything else.

Part 1: Does My Pet Actually Need a Supplement?

Start by Asking the Right Questions

Before adding any supplement, consider:

Does my pet have a diagnosed medical condition that may benefit from supplementation (e.g., osteoarthritis, skin allergies, kidney disease, cognitive decline)? Pets with current symptoms or problems take precedence over preventive or general-well-being supplements (see The Order of Priority above).

Is my pet in a group with increased needs?

• Brachycephalic breeds (Bulldogs, Pugs, French Bulldogs, Persian cats) that are prone to airway, gastrointestinal, skin, eye, and dental problems.
• Senior pets at higher risk for joint disease, cognitive decline, kidney disease, and cancer.
• Large and giant breed dogs prone to hip dysplasia and osteoarthritis.
• Pets with musculoskeletal injuries may benefit from joint support supplements.
• Pets with genetic predispositions identified through DNA testing: over 300 hereditary conditions can now be tested for in dogs and cats. The WSAVA-PennGen DNA Testing Database (research.vet.upenn.edu/WSAVA-LabSearch) is a searchable database of available DNA tests for hereditary diseases in dogs and cats.

Is my pet eating a complete and balanced diet? You can confirm this by reviewing the nutritional analysis. If the diet is complete and balanced, additional vitamins and minerals are usually unnecessary, and can be harmful in excess. Supplements added to homemade diets are not additional supplements; they’re required to make the food nutritionally complete and must be added into the entire batch of food before feeding.

Breed-Specific and Life-Stage Considerations

Brachycephalic breeds (flat-faced dogs and cats) face a unique set of health challenges:

• Brachycephalic Obstructive Airway Syndrome (BOAS): Breathing difficulties worsen with obesity; weight management is the most important intervention, not supplements.
• Gastrointestinal disease: French Bulldogs in particular have significantly higher rates of esophageal, gastric, and intestinal disease.
• Skin fold dermatitis: Omega-3 fatty acids may help with skin inflammation.
• Eye problems: Prominent, exposed eyes are prone to dryness, corneal ulcers, and injury.

Long-backed and chondrodystrophic breeds (Dachshunds, Corgis, Basset Hounds, Beagles, and similar) carry a conformational challenge built right into the skeleton: a long spine paired with dwarfed cartilage:

• Intervertebral disc disease (IVDD): their long back and chondrodystrophic discs are prone to early degeneration and herniation so that a single bad jump can trigger back pain or even paralysis.
• Everyday protection matters most: keep them lean, add ramps and steps, and walk them on a well-fitted harness instead of a neck collar.
• Spine and joint support: omega-3s and cartilage-protective supplements are smart to add early

Senior pets (dogs over 7–10 years; cats over 10–12 years):

• Cognitive decline (Cognitive Dysfunction Syndrome) resembles Alzheimer's disease in humans.
• Osteoarthritis: extremely common in older dogs.
• Kidney disease: especially common in older cats.
• Decreased immunity and muscle mass.

Large and giant breed dogs:

• Higher risk of joint problems from a year of age
• Benefit from early joint support

Pets with DNA test results showing genetic predispositions:

• DNA testing can now identify over 300 hereditary conditions in dogs and cats.
• DNA test results alone do not mean your pet will develop a disease; they indicate risk. Now is the time to down-regulate epigenetics!

Discuss results with your proactive veterinarian to determine if any preventive supplementation is appropriate.

The WSAVA-PennGen DNA Testing Database and large-scale commercial screening panels collectively document over 300 molecularly defined hereditary conditions in dogs and cats for which DNA tests are available, an increase of 112% between 2013 and 2020.¹,² The largest canine screening study to date tested for 250 disease-associated variants in over 1 million dogs, finding that 57% of dogs carry at least one such variant.³

Below is a comprehensive list organized by organ system, compiled from the published literature.

Dog DNA Testable Conditions

Eye Diseases

• Progressive retinal atrophy (PRA): multiple forms including prcd-PRA (progressive rod-cone degeneration), rcd1, rcd2, rcd3 (rod-cone dysplasia types 1, 2, 3)⁴, PRA-crd (cone-rod dystrophy), and breed-specific forms⁵:
• Collie eye anomaly (CEA): NHEJ1 gene deletion⁶
• Primary lens luxation (PLL):
• Canine multifocal retinopathy (CMR): types 1, 2, 3
• Achromatopsia (day blindness/cone degeneration)
• Hereditary cataracts (multiple breed-specific variants)
• Canine glaucoma (primary open-angle glaucoma)
  
  

Neurological Diseases

• Degenerative myelopathy (DM): SOD1 gene; found in 15+ breeds⁷
• Neuronal ceroid lipofuscinosis (NCL): multiple types (NCL1 through NCL10+)
• Cerebellar ataxia: multiple breed-specific forms
• Epilepsy (certain forms, e.g., Lafora disease in Miniature Wirehaired Dachshunds)
• Neonatal encephalopathy
• Spinocerebellar ataxia
• Exercise-induced collapse (EIC): DNM1 gene; Labrador Retrievers and related breeds
• Narcolepsy
• Sensory neuropathy
• Hereditary sensory autonomic neuropathy

Musculoskeletal Diseases

• Hip dysplasia (polygenic risk variants)
• Chondrodysplasia/chondrodystrophy (CDDY/CDPA): causes shortened legs and intervertebral disc disease risk
  
• Centronuclear myopathy (HMLR)
  
• Muscular dystrophy (Duchenne type / GRMD)
  
• Myotonia congenita⁸
• Osteogenesis imperfecta
• Skeletal dysplasia

Bleeding / Hematologic Disorders

• Von Willebrand disease: types 1, 2, and 3 (most common inherited coagulopathy in dogs)⁹
• Factor VII deficiency: found in mixed breeds and purebreds at significant frequency
• Hemophilia A (Factor VIII deficiency)
• Hemophilia B (Factor IX deficiency)
• Phosphofructokinase deficiency (PKFD)
• Pyruvate kinase deficiency
• May-Hegglin anomaly
• Trapped neutrophil syndrome
• Cyclic neutropenia (Gray Collie syndrome)

Metabolic / Endocrine Disorders

• Hyperuricosuria and hyperuricemia (HUU): SLC2A9 gene; found in many breeds and mixed breeds
• Cystinuria: multiple types
• Copper toxicosis (e.g., Bedlington Terrier copper storage disease)
• Glycogen storage diseases (multiple types)
• Malignant hyperthermia
• Congenital hypothyroidism
• Hypocatalasia: associated with oral health disease

Lysosomal Storage Diseases

• GM1 gangliosidosis¹⁰
• GM2 gangliosidosis
• Mucopolysaccharidosis (MPS): Types I, II, IIIA, IIIB, VI, VII
• Globoid cell leukodystrophy (Krabbe disease)
• Fucosidosis
• Alpha-mannosidosis
• Niemann-Pick disease (types A and C)
  

Cardiac Diseases

• Dilated cardiomyopathy (DCM): certain breed-specific variants (e.g., Doberman Pinscher)
• Arrhythmogenic right ventricular cardiomyopathy

Kidney / Urinary Diseases

• Familial nephropathy: breed-specific forms (e.g., Welsh Springer Spaniel, Cocker Spaniel)
• Polycystic kidney disease
• Hyperoxaluria (primary)
• Fanconi syndrome (Basenji)
• X-linked hereditary nephropathy (Alport syndrome)

Dermatologic Diseases

• Ichthyosis: multiple forms
• Dermatomyositis
• Hereditary nasal parakeratosis
• Ectodermal dysplasia

Immune Disorders

• Severe combined immunodeficiency (SCID)
• Complement deficiency
• Leukocyte adhesion deficiency (LAD)

Drug Sensitivity

• MDR1 (ABCB1) multidrug sensitivity: 4 bp deletion causing ivermectin and other drug toxicity; found in Collies and 7+ additional breeds¹¹

Others

• Degenerative myelopathy risk
• Multidrug resistance gene status
• Coat color and trait variants (not disease, but often included in panels)

Cat DNA Testable Conditions

• The largest feline genetic study screened over 11,000 cats and identified disease-associated variants in 47 breeds where they had not previously been documented.¹²

Cardiac Diseases

• Hypertrophic cardiomyopathy (HCM): MYBPC3 A31P mutation (Maine Coon), MYBPC3 R820W mutation (Ragdoll), MYBPC3 A74T, ALMS1 G3376R (Sphynx, and now found in Munchkin, Scottish Fold, and others)¹³, ¹⁴
• Restrictive cardiomyopathy: emerging genetic variants in ACTC1, ACTN2, MYH7, TNNT2, CSRP3 (Birman)¹⁵

Kidney Diseases

• Autosomal dominant polycystic kidney disease (ADPKD): PKD1 gene; prevalent in Persians, Exotic Shorthairs, Scottish Folds¹⁶

Hematologic / Blood Type

• Blood type A/B/AB: clinically important for transfusion compatibility and neonatal isoerythrolysis prevention
• Pyruvate kinase deficiency
• Factor XII deficiency

Eye Diseases

• Progressive retinal atrophy (rdAc, CEP290 mutation: Abyssinian, Siamese, and others)
• Progressive retinal atrophy (rdy — Abyssinian)

Metabolic / Lysosomal Storage Diseases

• GM1 gangliosidosis
• GM2 gangliosidosis
• Mucopolysaccharidosis (MPS VI, MPS VII)
• Niemann-Pick disease (type C)
• Glycogen storage disease type IV
• Alpha-mannosidosis

Neurological Diseases

• Spinal muscular atrophy (Maine Coon)

Musculoskeletal Diseases

• Hypokalemic polymyopathy (Burmese)
• Myotonia congenita

Other

• Congenital myasthenic syndrome
• Congenital adrenal hyperplasia
• Vitamin D-dependent rickets
• Coat color, fur length, and trait variants

Supplements for Proactive Prevention

Many nutraceuticals can help prevent conditions or slow their onset in at-risk pets. This is the second-priority tier (genetic predispositions and lifestyle risks), addressed once any current issues are addressed. Think of prevention as protecting against what's likely to happen, after you've treated what's already happening. Below are the conditions and at-risk groups where getting ahead with supplements tends to pay off:

Musculoskeletal & Neurologic

• Large- and giant-breed dogs predisposed to hip and elbow dysplasia and osteoarthritis.
• Long-backed and chondrodystrophic breeds (Dachshunds, Corgis, Bassets) at risk for intervertebral disc disease.
• Dogs with a previous joint injury or orthopedic surgery, where altered loading raises future arthritis risk.
• Breeds carrying the genetic marker for degenerative myelopathy.
• Senior pets sliding toward cognitive dysfunction syndrome and muscle atrophy
• Working dogs, canine athletes, and those with active lifestyles
• Animals with seizure disorders

Organ & Metabolic

• Older cats and breeds prone to chronic kidney disease.
• Breeds predisposed to heart disease (e.g., Cavalier King Charles Spaniels, Dobermans).
• Pets with a breed or family history of pancreatitis (especially Miniature Schnauzers).
• Breeds with copper-storage or other inherited liver vulnerabilities
• Animals with liver shunts
• Spayed or neutered pets (particularly early-altered), where hormone loss affects metabolism and the musculoskeletal system over time.
• Animals with recurrent kidney and bladder issues

Skin, Immune & Allergic

• Allergy- and atopy-prone breeds with recurrent inflammatory skin patterns.
• Brachycephalic pets managing skin-fold and airway issues.
• Any pet with a chronic inflammatory baseline that natural anti-inflammatories can help address (starting with omega 3’s)

Cancer & Longevity

• Cancer-predisposed breeds (Golden Retrievers, Boxers, Bernese Mountain Dogs, and others).
• Proactive antioxidant and anti-inflammatory support to down-regulate the epigenetic switches that influence whether risk becomes disease.

Remember the order: address any current problems first, then layer in preventive support for known predispositions, recurrent symptoms, and lifestyle risks.

Part 2: How to Build a Safe Supplement Stack for Your Pet

Golden Rules

1. Prioritize in the right order. Line up supplements from the most life-threatening condition to the least, then quality-of-life support, then genetic-risk prevention, then general wellbeing (see The Order of Priority above).
2. Confirm with your holistic, proactive, or veterinarian that stays up-to-date about nutraceuticals about your triage approach, if you aren’t sure.
3. One supplement at a time. Introduce new supplements individually, waiting to assess bowel health and overall wellbeing before adding another. This helps you identify any adverse reactions.
4. Choose quality products. Favor companies that conduct third-party testing, and be wary of dramatic health claims or all-in-one supplements — a single skin-gut-joint product probably doesn't contain effective doses to address all of those issues at once.
5. Follow dosing guidelines carefully.
6. Human supplements need extra attention.

Check Labels: What NOT to Give Your Pet

Some human supplements are dangerous or toxic to pets:

• Xylitol (a sugar alcohol found in some human supplements, gums, and peanut butters) causes life-threatening hypoglycemia and liver failure in dogs.
• Excessive vitamin D — can cause kidney failure in dogs and cats.
• Iron supplements (human formulations) can cause severe GI damage and organ failure.
• Alpha-lipoic acid: toxic to cats.

Part 3: When to Change, Adjust, or Stop Supplements

When Is It Time to Reassess?

No improvement after an adequate trial. Give each supplement enough time to work before judging it:

• Joint supplements: allow at least 8 weeks.
• Skin/coat supplements (omega-3s): allow at least 8–12 weeks.
• Probiotics for chronic GI issues: allow at least 4–6 weeks.
• If no benefit is seen after an adequate trial, discuss alternatives with your holistic veterinarian.

New medications. Some supplements interact with veterinary medications:

• SAMe may interact with certain antidepressants.
• Supplements containing calcium or iron may reduce absorption of some antibiotics.

Side effects. Common supplement side effects in pets include diarrhea or soft stool, vomiting, and decreased appetite. If they appear, stop the most recently added supplement and consult your veterinarian.

Before surgery, discuss all supplements with your veterinarian at least 2 weeks before any planned procedure.

Change in life stage or symptoms.  Reassess supplements when your pet transitions from adult to senior status, when a current health concern progresses, or whenever a new health condition is diagnosed.

Sources and References:

• ¹ Hum Genet 2012 Nov
• ² Vet J. 2013 Aug
• ³ PLoS Genet 2023 Feb 27
• ⁴ PLoS One 2016 Aug 15
• ⁵ Genes (Basel) 2025 Apr 23
• ⁶ Genes (Basel) 2023 Nov 17
• ⁷ PLoS One 2013 Sep 19
• ⁸ PLoS One 2017 Nov 22
• ⁹ J Vet Diagn Invest 2018 Mar
• ¹⁰  Hum Mol Genet 2019 Oct 1
• ¹¹  Vet Rec Open 2020 June 24
• ¹² PLoS Genet 2022 Jun 16
• ¹³ J Vet Intern Med. 2020 May
• ¹⁴ PLoS One 2023 Apr 18
• ¹⁵ Sci Rep 2025 Jan 31
• ¹⁶ J Feline Med Surg. 2023 Jul

About Karen Shaw Becker, DVM, CVH, CVA, CCRT

Veterinarian Dr. Karen Shaw Becker believes biologically appropriate food and an animal's immediate environment are essential in determining health, vitality, and lifespan. She has spent her career as a wildlife and exotic animal veterinarian and small animal clinician, empowering animal guardians to make intentional lifestyle decisions to enhance the well-being of their animals.