Here are some common genetic conditions found in Pugs:

Luxating Patella: (aka "trick knees") is common in Pugs. It is basically a dislocation of the small knee bone called the patella, from the femur in the leg.

Progressive Retinal Atrophy: degeneration of vessels around the retina. Can cause night blindness in younger dogs, which deteroriates progressively as they age.

Stenotic Nares: Is a birth defect found in breeds with short noses including the Pug and is essentially overly soft nasal tissue. When a dog with overly soft nasal tissues breathes, their nostrils collapse, leaving them to breathe through their mouths to get the necessary oxygen.

Pug Dog Encephalitis: Commonly called PDE, Pug Dog Encephalitis is as the name implies, unique to Pugs. Little, if anything is known of the causes of PDE, which is essentially an inflammation of the brain. PDE tends to affect young to middle aged Pugs and feature seizure as it’s primary symptom.
Pigmentary Keratitis: The deposit of pigment on the white surface of the eyes, PK is the result of many factors that either irritate or inflame the cornea.

Elongated Soft Palate: Common in short muzzled breeds, ESP is the obstruction of the dogs’ airways. The standard snoring of a Pug is a degree of ESP in action, though more severe cases can be heard through sounds such as honking, gasping for air and the blocking of the dogs’ vocal box. ESP can be corrected through surgery.

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Source(s):
http://www.pugvillage.com/genetic_issues.htm


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