Health

Pugs are prone to brachycephalic airway obstructive syndrome (BAOS) which causes respiratory distress in short-snouted breeds. Pugs have elongated palates. When excited, they are prone to "reverse sneezing" which causes them to quickly (and seemingly laboriously) gasp and snort. The veterinary name for this is pharyngeal gag reflex and it is caused by fluid or debris getting caught under the palate and irritating the throat or limiting breathing. Reverse sneezing episodes are usually not harmful, and massaging the dog's throat or covering its nose in order to make it breathe through its mouth can often shorten a sneezing fit.

Some pugs are also born with stenotic nares (pinched nostrils) which can inhibit their breathing. In serious cases, it makes breathing even more difficult and puts added pressure on the larynx. In some cases, the dog could pass out from blocked airways. If this happens, one should inquire with their veterinarian whether or not surgery is needed to open the nostrils.

Protruding eyes and eye prolapse is a common problem among pugs and other brachycephalic breeds and can be caused by a trauma to the head or neck. While the eye can usually be pushed back into its socket by the owner or by a vet, veterinary attention is usually advisable. If the prolapse happens on a regular basis, the pug might require surgery.

Pugs have many wrinkles in their faces, so owners will often clean inside the creases to avoid irritation and infection. If this is not done, the dog may develop a condition known as skin fold dermatitis.

An abnormal formation of the hip socket, known as hip dysplasia, affected nearly 64% of pugs in a 2010 survey performed by the Orthopedic Foundation for Animals; the breed was ranked the second worst-affected by this condition out of 157 breeds tested.

Pugs are one of several breeds that are more susceptible than other dogs to demodectic mange, also known as "demodex". This condition is caused when parasitic mites, that are often present in a dog's skin without causing symptoms, are allowed to do damage because their host has a weakened immune system. It is a problem for many young pugs, although not usually a major one, and is easily treatable, but some are especially susceptible and present with a systemic form of the condition. This vulnerability is thought to be genetic and breeders will avoid producing puppies from adults who have this condition.

In 2008, an investigative documentary carried out by the BBC found significant inbreeding between pedigree dogs, with a study by Imperial College, London, showing that the 10,000 pugs in the UK were so inbred that their gene pool was the equivalent of only 50 individuals.

Pugs can suffer from necrotizing meningoencephalitis (NME), also known as pug dog encephalitis (PDE), an inflammation of the brain and meninges. NME also occurs in other small dogs, such as the Yorkshire Terrier, Maltese, and Chihuahua. There is no known cure for NME, which is believed to be an inherited disease. Dogs usually die or have to be put to sleep within a few months of onset, which, in those susceptible to this condition, is mostly between six months and three years of age.

This breed, along with other brachycephalic dogs (e.g., boxers, bulldogs), are also prone to hemivertebrae. The curled tail of a British bulldog is an example of a hemivertebrae, but when it occurs not in the coccygeal vertebrae but in other areas of the spine, it can cause paralysis. The condition occurs when two parts of a spinal vertebra do not fuse properly while a young pug is still growing, resulting in an irregularly shaped spinal cavity which can put pressure on the spinal cord.

Health

The Powderpuff is not affected by many of the congenital diseases found in other toy breeds. They are, however, prone to some of these conditions listed. Eye problems such as lens luxation, glaucoma, and PRA (Progressive Retinal Atrophy), luxating patellas, and Legg-Perthes disease. The Powderpuff should have full dentition, not missing or crooked teeth, as is accepted in their sibling the Hairless variety.

Chinese Crested Dogs have what is called a "primitive mouth". This means that most of their teeth are pointy, like their canines. Hairless varieties of the Cresteds can be prone to poor dentition. Poor dentition may include missing or crowded teeth and teeth prone to decay when not properly cared for. Most dogs of the Powderpuff variety have few, if any, dental defects.

Eyes are a concern within the breed, with many suffering from a painful and blinding inherited eye disease called Primary Lens Luxation (PLL). The Chinese Crested Dog can also have at least two forms of progressive retinal atrophy (PRA) which can eventually lead to blindness as well. For PLL and also one of the forms of PRA, there exists a genetic test, to determine if a dog is a "carrier, clear, or affected." prcd-PRA. Since the test for prcd-PRA can only reveal the existence of affected or carrier status of this one form of PRA, breeders and owners of the breed should still have regular eye exams by veterinary ophthalmologists. The breed also suffers from another eye disease called Keratoconjunctivitis sicca or dry eye syndrome (DES).

Along with Kerry Blue Terriers, Chinese Crested Dogs can develop canine multiple system degeneration (CMSD) also called progressive neuronal abiotrophy (PNA) in Kerry Blue Terriers. This is a progressive movement disorder that begins with cerebellar ataxia between 10 and 14 weeks of age. After 6 months of age, affected dogs develop difficulty initiating movements and fall frequently. The gene responsible has been mapped to canine chromosome 1.

As with all other toy breeds, the Chinese Crested Dog can be prone to patellar luxation. This inheritable condition is caused by shallow knee joints (stifles) and results in kneecaps that pop out of place. Its onset is often at a young age, and can cause temporary to permanent lameness based on the severity. Breeders should have their stock certified free of patellar luxation. Many countries' kennel clubs maintain a centralised registry for health results.

Allergy and autoimmune diseases have been observed in the breed. Some food allergies can also cause skin breakouts, like excess blackheads, pimples and dryness. It has been observed that this breed has an allergy to chicken and many owners opt for a chicken free diet or a homemade one. The severity of these ailments, which can lead to the premature death of the dog, means this is something breeders need to take seriously in order to avoid it becoming a problem for the breed.