A healthy dog has clear, bright eyes with no discharge; pink, odorless ears with no wax buildup; clean teeth with no excessive tartar or inflamed gums; a glossy coat with no bald patches or excessive shedding; ribs that are easily felt but not visually prominent; formed brown stools; pale yellow urine; and energy levels appropriate to breed and age. These markers collectively indicate a dog whose major body systems are functioning normally and who has no significant subclinical disease. Knowing what healthy looks like makes it far easier to identify when something is wrong.
Why Knowing the Signs of a Healthy Dog Matters
Veterinary professionals consistently report that one of the most important skills an owner can develop is the ability to perform a basic at-home health assessment. Dogs cannot report symptoms verbally, and many conditions — dental disease, early kidney disease, hypothyroidism, early cancer — produce no obvious outward signs until they are significantly advanced.
Owners who routinely handle their dogs, observe their behavior, and know what their healthy baselines look like are far more likely to identify subtle changes early. Early detection is the single most important factor in treatment outcome for the majority of conditions that shorten dog lifespans.
The American Veterinary Medical Association recommends annual wellness examinations for all dogs, with bi-annual exams for senior dogs (over 7 years, or over 5 years for giant breeds). Home assessment between these visits is an important complement to professional care.
Eyes: What Healthy Dog Eyes Look Like
Healthy dog eyes are clear, moist, and bright. The white of the eye (sclera) should be white or very slightly cream-colored with no significant redness, yellowness, or visible blood vessels. The pupils should be approximately equal in size and should respond to changes in light level.
A small amount of sleep crust in the inner corner of the eye after sleeping is normal and comparable to the "sleep" humans accumulate. Clear or slightly white discharge that is thin and minimal in quantity is generally normal. Any of the following require veterinary evaluation: yellow or green discharge (indicates infection), excessive tearing (epiphora), cloudiness of the cornea or lens, redness of the conjunctiva, squinting or pawing at the eye, unequal pupil sizes, or visible third eyelid (nictitating membrane) that is not normally present.
Some breeds — particularly flat-faced dogs and those with large round eyes such as Pugs, Boston Terriers, and Shih Tzus — are prone to corneal disease, dry eye (keratoconjunctivitis sicca), and eye injuries due to their anatomy. Owners of these breeds should familiarize themselves with normal versus abnormal eye appearance.
Ears: Signs of Healthy and Unhealthy Ears
The inner surface of a healthy ear is pale pink, clean, and odorless, with minimal visible wax. Ears may accumulate a small amount of light brown, non-offensive wax, which is normal sebaceous secretion. The skin lining the ear canal should appear smooth and unthickened.
Ear disease is one of the most common veterinary diagnoses in dogs. Signs of ear problems include: dark brown or black discharge (often indicates yeast or bacterial infection), foul or distinctive odor from the ear (yeast infections produce a characteristic sweet-musty smell), redness or swelling of the ear flap or canal, the dog pawing at its ears or shaking its head frequently, tilting the head persistently, or yelping when ears are touched.
Breeds with floppy ears (Cocker Spaniels, Basset Hounds, Labrador Retrievers), hairy ear canals (Poodles, Portuguese Water Dogs), or ears that limit airflow are at higher risk for recurrent ear infections. These breeds benefit from regular ear inspection and may require routine ear cleaning with veterinarian-recommended products.
"Ear disease (otitis externa) accounts for approximately 14% of all veterinary visits for dogs. It is among the most common conditions we see, and many cases could be caught earlier with routine home inspection." — Veterinary Partner (Veterinary Information Network), 2023
Teeth and Gums: The Window to Internal Health
Healthy dog teeth are white to cream-colored with no obvious tartar deposits. Tartar appears as yellow-brown accumulation, heaviest on the large upper back teeth (carnassials) and the inner surfaces of the lower front teeth. Gums are pink and firm, with a moist surface and a distinct gum line where the tooth emerges cleanly without pocketing.
The gum color in dogs is a rapid indicator of systemic health. Pale or white gums suggest anemia or blood loss. Blue or grey gums indicate inadequate oxygenation (cardiac or respiratory emergency). Brick red or very dark pink gums may indicate heatstroke or toxin exposure. Yellow gums indicate jaundice. Any gum color other than normal pink requires urgent veterinary assessment.
The "capillary refill time" test measures circulatory function: press a finger firmly against the gum for one to two seconds, release, and count how many seconds it takes for the blanched spot to return to pink. Normal refill is less than two seconds. Delayed refill suggests poor circulation and requires veterinary attention.
Dental disease progression in dogs follows a predictable pattern from plaque (soft, invisible), to tartar (hard, yellow-brown), to gingivitis (red, swollen gum line), to periodontal disease (gum recession, bone loss, loosened teeth). By age three, approximately 80% of dogs have some degree of periodontal disease according to the American Veterinary Dental College.
Coat and Skin: What Healthy Fur Looks Like
A healthy coat is glossy, lays flat or falls naturally depending on breed type, and has no bald patches, excessive thinning, or areas of dull, brittle, or broken hairs. Some shedding is normal and varies enormously by breed — double-coated breeds (Huskies, German Shepherds, Golden Retrievers) shed heavily seasonally, while low-shedding breeds (Poodles, Bichon Frises, Schnauzers) lose very little hair.
The skin underlying the coat should be supple, not flaky, red, or thickened. Parting the fur should reveal skin with no obvious crusts, scale, greasiness, or rash. Flea dirt — tiny black specks that turn red-brown when wet — is a common finding and indicates flea infestation even when no live fleas are visible.
Common signs of skin and coat problems that require veterinary evaluation: excessive scratching, chewing, or licking at the skin; hair loss in patches or symmetrically on the body (symmetrical hair loss often indicates hormonal disease such as hypothyroidism or hyperadrenocorticism); skin that is persistently red, thickened, or darkened; hot spots (moist, rapidly expanding skin lesions); persistent dandruff not resolved by diet change.
Body Weight: How to Assess if Your Dog Is a Healthy Weight
Visual and tactile body condition scoring is more accurate than weight alone for assessing whether a dog is at a healthy weight, because normal weight varies substantially even within breeds.
The standard approach is to place both hands on either side of the rib cage and gently feel for the ribs. In a healthy-weight dog, the ribs are readily felt as distinct bony prominences with a small covering of fat, but are not visually protruding through the skin. From above, there should be a visible waist (narrowing behind the rib cage). From the side, there should be a visible abdominal tuck (the belly rises toward the hind end).
An overweight dog has ribs that require pressure to feel through a thick fat layer. An underweight dog has ribs, hip bones, and spine that are visually prominent and easily felt with no fat covering.
The World Small Animal Veterinary Association (WSAVA) publishes a standardized 9-point body condition score chart that veterinarians use for assessment. A score of 4 to 5 on this scale is ideal. Understanding this scale helps owners track their dog's weight trajectory between veterinary visits.
"Obesity is the most prevalent nutritional disease in companion animals in developed countries. Studies consistently show that overweight dogs have shorter lifespans, higher rates of orthopedic disease, cardiovascular disease, and diabetes, and lower quality of life scores." — WSAVA Global Nutrition Committee, 2013
Digestive Health: Normal Stools and Appetite
Normal dog stools are brown, formed (sausage-shaped, holds shape), and consistent from day to day. Stool scoring systems used in veterinary medicine rate from 1 (very hard, dry pellets) to 7 (liquid diarrhea). A score of 3 to 4 is ideal — formed and moist but not hard.
Occasional soft stools or brief diarrhea are common in dogs and usually self-resolve within 24 to 48 hours with dietary management (bland food, appropriate fasting). Persistent diarrhea (more than 2 to 3 days), blood in the stool (red = lower GI, black/tarry = upper GI), mucus-covered stools, or stools accompanied by vomiting, lethargy, or abdominal pain all require veterinary attention.
Appetite should be consistent. Dogs that eat enthusiastically every meal and maintain a stable weight are typically in good nutritional health. Sudden loss of appetite lasting more than 24 to 48 hours in an adult dog, or more than 12 hours in a puppy, warrants veterinary assessment.
Energy and Behavior: When to Worry About Changes
Energy level varies enormously between breeds, individual dogs, and life stages. What constitutes normal activity for a 2-year-old Border Collie is very different from normal for a 10-year-old Basset Hound. The key indicator is change from individual baseline.
A dog that suddenly becomes lethargic, less interested in play or walks, or reluctant to perform activities it previously enjoyed is communicating that something has changed. This may reflect pain (particularly relevant in dogs with known joint disease), infection, anemia, endocrine disease, or many other conditions.
Behavioral changes including increased aggression, sudden fearfulness, loss of house-training in a trained adult dog, or unusual repetitive behaviors (circling, head pressing, staring) may indicate neurological or cognitive changes requiring evaluation.
Dog Health Assessment Checklist
| Body System | Healthy Indicator | Concerning Signs |
|---|---|---|
| Eyes | Clear, no discharge, equal pupils | Yellow/green discharge, cloudiness, redness, squinting |
| Ears | Pink, odorless, minimal clean wax | Dark discharge, odor, head shaking, scratching |
| Teeth/Gums | Cream teeth, pink gums, no heavy tartar | Yellow-brown tartar, red gums, bad breath, pale/yellow/blue gums |
| Coat | Glossy, no bald patches | Dull, brittle, patchy loss, excessive shedding, itching |
| Skin | Supple, no crusts or redness | Persistent redness, hot spots, scale, flea dirt |
| Weight | Ribs felt easily, visible waist | Ribs invisible/prominent, no waist definition |
| Stools | Brown, formed, consistent | Diarrhea, mucus, blood, very hard pellets |
| Urine | Pale to medium yellow | Very dark, cloudy, blood-tinged, straining |
| Appetite | Consistent, enthusiastic | Sudden loss of appetite lasting >24 hours |
| Energy | Consistent with individual baseline | Sudden lethargy, reluctance to exercise |
| Breathing | Quiet at rest, unlabored | Labored breathing at rest, persistent cough |
| Movement | Fluid, symmetrical | Limping, stiffness, reluctance to rise |
Red Flags That Require Immediate Veterinary Care
Certain signs require emergency veterinary attention rather than a scheduled appointment: pale, white, or blue gums; difficulty breathing or extreme respiratory distress; collapse or inability to stand; severe vomiting or diarrhea with blood; the dog's abdomen appears suddenly distended and it is restless and cannot settle (possible GDV/bloat in deep-chested breeds); suspected toxin ingestion; seizures; eye injury or sudden blindness; any significant trauma.
For further reading on dog health and behavior, see How Long Do Dogs Live?, Why Do Dogs Eat Grass?, How to Train a Puppy, Why Do Dogs Lick People?, and How Far Can Dogs Smell?.
References
American Veterinary Dental College. (2022). Periodontal disease. https://avdc.org/periodontal-disease
World Small Animal Veterinary Association. (2013). WSAVA nutritional assessment guidelines. Journal of Small Animal Practice, 52(7), 385-396. https://doi.org/10.1111/j.1748-5827.2011.01079.x
Cave, N. J., Allan, F. J., Schokkenbroek, S. L., Metekohy, C. A. M., & Pfeiffer, D. U. (2012). A cross-sectional study to compare changes in the prevalence and risk factors for feline obesity between 1993 and 2007 in New Zealand. Preventive Veterinary Medicine, 107(1-2), 121-133. https://doi.org/10.1016/j.prevetmed.2012.05.006
German, A. J. (2006). The growing problem of obesity in dogs and cats. Journal of Nutrition, 136(7), 1940S-1946S. https://doi.org/10.1093/jn/136.7.1940S
Veterinary Partner (Veterinary Information Network). (2023). Ear infections in dogs. https://veterinarypartner.vin.com
Holsworth, I. G., & Schulz, K. S. (2009). Disorders of the musculoskeletal system. In S. J. Ettinger & E. C. Feldman (Eds.), Textbook of Veterinary Internal Medicine (7th ed.). Saunders Elsevier.
Frequently Asked Questions
How do I know if my dog is healthy?
A healthy dog has clear eyes, clean odorless ears, pink gums and white-cream teeth, a glossy coat, easily palpable but not prominent ribs, formed brown stools, consistent appetite, and energy appropriate to its breed and age.
What do healthy dog gums look like?
Healthy dog gums are pink and moist. Press a finger against the gum and release — the blanched area should return to pink within 2 seconds (capillary refill time). Pale, white, blue, yellow, or brick-red gums indicate systemic emergencies.
How can I tell if my dog is overweight?
Place both hands on either side of the rib cage and feel for the ribs. In a healthy-weight dog, ribs are easily felt with a slight fat covering but are not visually visible. From above there should be a visible waist; from the side, an abdominal tuck.
What are signs of dental disease in dogs?
Signs of dental disease include yellow-brown tartar on the teeth, red or swollen gum line, bad breath, loose teeth, or reluctance to eat hard food. By age 3, approximately 80% of dogs have some degree of periodontal disease.
What dog symptoms require an emergency vet visit?
Seek immediate veterinary care for: pale or blue gums, difficulty breathing, collapse, bloody diarrhea or vomiting, sudden abdominal distension with restlessness (possible bloat), suspected toxin ingestion, seizures, or eye injuries.
How often should I take my dog for a health check?
The American Veterinary Medical Association recommends annual wellness exams for adult dogs and bi-annual exams for seniors (over age 7, or over 5 for giant breeds). Home health assessments between visits help catch early changes.