Pet Health Library

Guides to pet symptoms and conditions, cited to the veterinary literature — what's normal, what's not, and when to see a vet.

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Showing 1–24 of 103 articles found

🐕Dog HealthOct 7, 2026

👁️Eyes & Ears

Dog's One Eyelid Swollen: Skin Lump or Eye Emergency?

A swollen eyelid is not the same as a red eyeball. Check whether the eye is painful or the face is swelling, and have a veterinarian examine the cause.

🐭Chinchilla HealthOct 5, 2026

👁️Eyes & Ears

Chinchilla Suddenly Tilting Its Head: Ear Problem or Something Else?

A persistent new head tilt in a chinchilla is a balance sign, not a diagnosis. Ear disease is one possibility, and falling or rolling makes care urgent.

🐈Cat HealthOct 4, 2026

👁️Eyes & Ears

Cat Ear Flap Suddenly Swollen: Fluid Pocket or Another Problem?

A soft new swelling of a cat's ear flap may be an aural hematoma, but a bite, skin lesion, or canal disease needs an examination. Do not drain it at home.

🐁Mouse HealthOct 4, 2026

👁️Eyes & Ears

Pet Mouse Squinting One Eye Shut: Injury or Irritation?

A mouse holding one eye closed may have eye-surface pain, eyelid swelling, or discharge. Watch for bulging and changes in eating, and arrange a prompt exotic-vet examination.

🐕Dog HealthSep 28, 2026

👁️Eyes & Ears

Dog's Pupils Are Different Sizes: When Anisocoria Is an Emergency

Unequal pupils can come from painful eye disease or a neurologic problem, so a new difference should be assessed promptly rather than watched for several days.

🦜Bird HealthSep 25, 2026

👁️Eyes & Ears

Pet Bird Head Shaking: Irritation, Ear Disease, or Neurologic Sign?

Repeated head shaking in a pet bird can reflect eye, nose, ear, respiratory, trauma, or neurologic problems; the movement pattern and accompanying signs guide urgency.

🐰Rabbit HealthSep 25, 2026

👁️Eyes & Ears

Rabbit One Eye Bulging: Dental, Orbital, or Eye Emergency?

One protruding eye in a rabbit may reflect retrobulbar infection, dental disease, a mass, trauma, or eye enlargement and needs prompt exotic-veterinary assessment.

🐕Dog HealthSep 25, 2026

👁️Eyes & Ears

Dog Suddenly Blind or Bumping Into Things: What to Do Now

Sudden collisions, hesitation, or loss of visual tracking can come from a painful eye emergency, retinal disease, or a neurologic problem and need prompt assessment.

🐹Hamster HealthSep 24, 2026

👁️Eyes & Ears

Hamster Squinting One Eye: Irritation, Injury, or a Deeper Problem?

A hamster holding one eye partly or fully closed may have irritation, a corneal injury, conjunctivitis, eyelid disease, or swelling linked to the mouth or face.

🦎Reptile HealthSep 23, 2026

👁️Eyes & Ears

Bearded Dragon Keeping One Eye Closed: Irritation, Injury, or Illness?

A bearded dragon that repeatedly keeps one eye closed may have debris, retained shed, trauma, infection, corneal disease, or a deeper eye problem.

🐭Chinchilla HealthSep 20, 2026

👁️Eyes & Ears

Chinchilla Cloudy Eye: Surface Injury, Ulcer, or Cataract?

A cloudy chinchilla eye may involve the cornea, inflammation, infection, cataract, pressure, or nearby dental disease. Learn which changes need urgent exotic-vet care.

🐹Guinea Pig HealthSep 20, 2026

👁️Eyes & Ears

Guinea Pig Cloudy or Injured Eye: Ulcer, Hay Poke, or Cataract?

A cloudy guinea pig eye may reflect a surface injury, ulcer, inflammation, infection, cataract, or pressure problem. Learn which changes need urgent exotic-vet care.

🦎Reptile HealthSep 17, 2026

👁️Eyes & Ears

Turtle Swollen Ear Lump: Aural Abscess or Another Mass?

A firm lump behind a turtle's eye is often an aural abscess, but trauma and other masses can look similar. Learn what not to squeeze and when reptile care is urgent.

🐰Rabbit HealthSep 16, 2026

👁️Eyes & Ears

Rabbit One Ear Drooping: Normal Position or Ear Disease?

One drooping ear may be normal in a half-lop rabbit, but a sudden change can signal pain, ear infection, mites, trauma, heat stress, or neurologic disease. Learn what to observe and when care is urgent.

🐈Cat HealthSep 15, 2026

👁️Eyes & Ears

Cat Unequal Pupils: When Anisocoria Is an Eye Emergency

Unequal pupil size in a cat can come from painful eye disease, nerve dysfunction, trauma, medication exposure, or a harmless old difference. A new change needs prompt evaluation.

🐹Guinea Pig HealthSep 14, 2026

👁️Eyes & Ears

Guinea Pig Squinting One Eye: Injury, Ulcer, or Dental Pain?

A guinea pig holding one eye partly or fully closed is usually showing discomfort. Check for discharge, cloudiness, swelling, appetite change, and hay or bedding injury, then arrange prompt exotic-vet care.

🦎Reptile HealthSep 11, 2026

👁️Eyes & Ears

Leopard Gecko Swollen Eye: What to Check and When It Is Urgent

A swollen or closed eye in a leopard gecko can reflect retained shed, debris, infection, trauma, or deeper disease and deserves prompt reptile-veterinary assessment.

🐭Gerbil HealthSep 9, 2026

👁️Eyes & Ears

Gerbil Eye Discharge: Irritation, Injury, or Illness?

Gerbil eye discharge may reflect porphyrin-rich secretions, dust, injury, infection, or disease behind the eye. Learn what to observe and what not to put in the eye.

🐾Ferret HealthSep 6, 2026

👁️Eyes & Ears

Ferret Squinting One Eye: Injury, Ulcer, or Irritation?

A ferret holding one eye partly closed may have painful surface injury, debris, inflammation, or deeper disease. Learn what to observe and why prompt examination matters.

🐟Fish HealthSep 6, 2026

👁️Eyes & Ears

Aquarium Fish Popeye: One Swollen Eye or Both?

Popeye describes a protruding fish eye, not a diagnosis. Learn how one-sided and two-sided patterns guide the water-quality, injury, gas, and infection workup.

🦎Reptile HealthSep 4, 2026

👁️Eyes & Ears

Tortoise Swollen Eyes: Humidity, Infection, Injury, or Vitamin A?

Swollen or closed tortoise eyes are not automatically vitamin A deficiency. Check both eyes, breathing, appetite, enclosure humidity, substrate, and trauma, and avoid blind supplements or human drops.

🐿️Sugar Glider HealthSep 2, 2026

👁️Eyes & Ears

Sugar Glider Crusty Ears: Mites, Infection, or Skin Disease?

Crusty or ragged sugar glider ears can reflect mites, infection, trauma, self-injury, or another skin disorder. Do not pick the crusts or apply dog-and-cat mite products; arrange an exotic-veterinary examination.

🐟Fish HealthSep 2, 2026

👁️Eyes & Ears

Goldfish Cloudy Eye: Water Problems, Injury, or Eye Disease?

A cloudy goldfish eye is a visible sign, not a diagnosis. Check whether one or both eyes are affected, test the water, look for bubbles or injury, and arrange fish-veterinary help when vision, appetite, breathing, or the eye itself is worsening.

🦔Hedgehog HealthAug 31, 2026

👁️Eyes & Ears

Hedgehog Ear Discharge: Infection, Mites, or Skin Disease?

Ear discharge, odor, crusting, or pain in a hedgehog can arise from otitis, mites, or inflamed skin. Avoid cleaning deep in the ear and arrange an exotic-pet examination.