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Dog Diseases and Symptoms

This page gives you a list of dog diseases and symptoms for quick reference.

Two Dogs

Dogs cannot tell us when they are not feeling well, but their body language speaks louder than words. By learning to recognize some canine illness symptoms and signals, you will come to notice quite quickly what is wrong with your dog and what action you need to take.

Knowing the symptoms of certain common diseases gives you an idea as to whether your dog's condition is serious enough to warrant a visit to the vet, or whether home care is sufficient. Educating yourself and learning some common dog diseases and symptoms can make you a better dog parent!

As you will see, different dog diseases and health problems can result in similar canine illness symptoms. The key is to observe your dog and identify as many symptoms as you possibly can. Usually that will give you a better idea at least as to whether the problem is a serious one. The bottom line is, when in doubt, and when the symptoms persist, consult a veterinarian before considering or attempting any type of treatment.

This page gives a list of some common dog diseases and symptoms for your quick reference. New information will periodically be added to this page, so be sure to check back regularly!

Common Dog Diseases and Symptoms A-Z

| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |


Illness Symptoms Possible Diseases
Appetite Gain diabetes mellitus, Cushing's disease
Appetite Loss Addison's disease, GI problems (constipation, diarrhea, IBD, fecal impaction, ulcers), blastomycosis, dental or gum diseases, diabetes mellitus, diet change, ehrlichiosis, heart disease, infections (distemper, kennel cough, leptospirosis), Lyme disease, kidney failure, kidney infection, liver failure, mange, pancreatitis, stomach cancer, worm infestations

Illness Symptoms Possible Diseases/Causes
Bad Breath bladder infections, dental/gum diseases, kidney failure, mouth cancer, poisoning, poor digestion, stomach/intestinal problems (constipation, gas, diarrhea)
Bloat diarrhea, Gastric-Dilatation-Volvulus, worm infestations
Blood in Urine bladder cancer, bladder infections, bladder stones, injuries, kidney disease, leptospirosis, prostate enlargement
Bowel Incontinence complication of certain surgeries, diarrhea, old age, spinal cord injuries

Illness Symptoms Possible Diseases/Causes
Constipation anal gland problems, cancer, diet change, hypothyroidism, intestinal blockage, liver disease, medications, prostate enlargement, stress, worm infestations
Coughing allergies, asthma, blastomycosis, distemper, dog flu, heart disease, heartworms, hepatitis, lung cancer, kennel cough, parvovirus, pneumonia, roundworms, sore throat, tonsillitis, tracheal collapse

[Top] of Dog Diseases and Symptoms

Illness Symptoms Possible Diseases/Causes
Dandruff Diabetes mellitus, hypothyroidism, kidney failure
Dehydration Addison's disease, diabetes mellitus, diarrhea, fever, heatstroke, leptospirosis, kidney failure, parvovirus, vomiting
Depression acute infections, Addison's disease, arthritis, blastomycosis, cancer, coronavirus, ehrlichiosis, hypoglycemia, kidney failure, leptospirosis, pancreatitis, parvovirus, pneumonia, poisoning, prostatitis
Diarrhea Addison's disease, colitis, dietary indiscretion, distemper, food allergies, inflammatory bowel disease, intestinal parasites (e.g. Giardia, worms), leptospirosis, liver disease, pancreatitis, parvovirus, poisoning, stomach cancer
Drooling bloat, epilesy, heat stroke, liver disease, mouth tumors, motion sickness, peridontal disease, pain, poisoning, rabies

Illness Symptoms Possible Diseases/Causes
Ears, Itchy allergies, ear infections, ear mites
Eyes, Cloudy cataracts, glaucoma, keratitis
Eyes, Discharge atopy, blepharitis, corneal or inner eye problems, cherry eye, conjunctivitis, dry eye, distemper, eye infections, glaucoma, kennel cough, keratitis, tooth abscess, uveitis
Eyes, Painful corneal injuries, glaucoma, keratitis
Eyes, Red allergies, conjunctivitis

Illness Symptoms Possible Diseases/Causes
Fecal Incontinence complication of certain surgeries, diarrhea, old age, spinal cord injuries
Fever bladder infection, brain infection, diabetes, ehrlichiosis, dog flu, kennel cough, distemper, food poisoning, kidney infection, leptospirosis, leukemia, Lyme disease, mange, parvovirus, pneumonia, prostatitis, sore throat, tonsillitis, valley fever

[Top] of Dog Diseases and Symptoms

Illness Symptoms Possible Diseases/Causes
Gagging elongated soft palate, foreign objects in esophagus, mouth, or throat, kennel cough, rhinitis, roundworms, sinusitis

Illness Symptoms Possible Diseases/Causes
Hair Loss atopy, Cushing's disease, diabetes mellitus, hot spots, hypothyroidism, mange, ringworm, scabies, seborrhea
Head Tilt brain tumors, ear infections, ear mites, encephalitis, head injuries, hypothyroidism, idiopathic vestibular syndrome, punctured ear drum
Heart Murmur anemia, heartworm infestation, chronic valvular disease, congenital heart disease

Illness Symptoms Possible Diseases/Causes
Itching atopy, contact dermatitis, flea allergies, food allergies, hot spots, lick granuloma, mange, scabies, stress, ticks, walking dandruff (Cheyletiellosis)

Illness Symptoms Possible Diseases/Causes

Illness Symptoms Possible Diseases/Causes

Illness Symptoms Possible Diseases/Causes
Lethargy lots of illnesses, such as anemia, arthritis, bloat, cancer, chronic infection or inflammation, gastritis, glaucoma, heart problems (e.g. congestive heart failure), hormonal or metabolic disorders (e.g. Cushing's disease, Addison's disease, hypothyroidism, diabetes mellitus, etc.), hypoglycemia, hypothermia, infectious diseases (e.g. leptospirosis, distemper, parvovirus, etc.), parasites (e.g. worms), poisoning, periodontal problems, trauma
Limping arthritis, bone tumors, ehrlichiosis, elbow dysplasia, hip dysplasia, injuries, Lyme disease, pemphigus foliaceus

Illness Symptoms Possible Diseases/Causes

Illness Symptoms Possible Diseases/Causes
Nasal Discharge allergies, foreign objects, influenza, kennel cough, distemper, nasal cancer, periodontal disease, pneumonia, rhinitis, sinusitis
Nose Bleeding blood-clotting disorders (e.g. anticoagulant rat poisons, ehrlichiosis, hemophilia, Rocky Mountain Spotted Fever, von Willebrand's disease), foreign objects, nasal infections, nasal cancer, trauma

[Top] of Dog Diseases and Symptoms

Illness Symptoms Possible Diseases/Causes
Odor, Ear ear infections
Odor, Rear End anal gland problems, perianal fistulas
Odor, Skin allergies, hot spots, mange, ringworm, scabies, seborrhea

Illness Symptoms Possible Diseases/Causes
Panting acute abdominal pain, anemia, anxiety, congestive heart failure, Cushing's disease, eclampsia (milk fever), heatstroke, heartworms

Illness Symptoms Possible Diseases/Causes

Illness Symptoms Possible Diseases/Causes
Runny Nose (Nasal Discharge) allergies, foreign objects, influenza, kennel cough, distemper, nasal cancer, periodontal disease, pneumonia, rhinitis, sinusitis

Illness Symptoms Possible Diseases/Causes
Scooting anal sac problems, back injury, clipper burns, diarrhea, flea bites, food allergies, perianal fistulas, tapeworms
Seizures brain tumors, Cushing's disease, distemper, encephalitis (infection of the brain), epilepsy, head injuries, heatstroke, hypoglycemia, liver disease (hepatic encephalopathy), poisoning
Shaking head allergies (e.g. fleabite allergy dermatitis, contact dermatitis, food allergy), aural hematoma, ear infections, ear mites, foreign objects in ear, infections, ticks, toxicity, vestibular disease
Sneezing atopy, foreign objects in nose, influenza, insect bites, tooth abscess, tumors in the nose, upper respiratory tract infections

[Top] of Dog Diseases and Symptoms

Illness Symptoms Possible Diseases/Causes
Tilting Head brain tumors, ear infections, ear mites, encephalitis, head trauma, hypothyroidism, toxicity, vestibular disease

Illness Symptoms Possible Diseases/Causes
Urinary Incontinence/ Frequent Urination arthritis, brain tumors, ectopic ureter, bladder cancer, bladder stones, bladder infections, Cushing's disease, diabetes mellitus, hip dysplasia, hormonal deficiencies, liver problems, kidney failure, spinal cord injuries

Illness Symptoms Possible Diseases/Causes
Vomiting Addison's disease, Cushing's disease, diabetes mellitus, distemper, food poisoning, inner ear infections, intestinal parasites (e.g. roundworms), leptospirosis, liver failure, kidney failure, pancreatitis, parvovirus, stomach problems (e.g. gastritis, stomach ulcers, stomach cancer

Illness Symptoms Possible Diseases/Causes
Weight Gain hypothyroidism
Weight Loss Addison's disease, blastomycosis, cancer, Cushing's disease, diabetes, digestive problems (e.g. gastritis, ehrlichiosis, IBD), giardia, heart disease, kidney failure, Lyme disease, stomach ulcers, stomach cancer, worm infestations
Wheezing allergies, asthma, bronchitis, congestive heart failure, heartworms, kennel cough, sinus infections, tumors (of the larynx, trachea, and lungs)

Illness Symptoms Possible Diseases/Causes

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