Health

The median longevity of Beagles is about 12.3 years, which is a typical lifespan for a dog of their size. Weight gain can be a problem in older or sedentary dogs, which in turn can lead to heart and joint problems. Beagles may be prone to epilepsy, but this can be controlled with medication. Hypothyroidism and a number of types of dwarfism occur in Beagles. Two conditions in particular are unique to the breed:

Funny Puppy, in which the puppy is slow to develop and eventually develops weak legs, a crooked back and although normally healthy, is prone to range of illnesses

Chinese Beagle Syndrome in which the eyes are slanted and the outer toes are underdeveloped but otherwise development is as normal.

Hip dysplasia, common in Harriers and in some larger breeds, is rarely considered a problem in Beagles.

In rare cases Beagles may develop immune mediated polygenic arthritis (where the immune system attacks the joints) even at a young age. The symptoms can sometimes be relieved by steroid treatments.

Their long floppy ears can mean that the inner ear does not receive a substantial air flow or that moist air becomes trapped, and this can lead to ear infections. Beagles may also be affected by a range of eye problems; two common ophthalmic conditions in Beagles are glaucoma and corneal dystrophy. "Cherry eye", a prolapse of the gland of the third eyelid, and distichiasis, a condition in which eyelashes grow into the eye causing irritation, sometimes exist; both these conditions can be corrected with surgery. They can suffer from several types of retinal atrophy. Failure of the nasolacrimal drainage system can cause dry eye or leakage of tears onto the face.

Health

Heart Disease
Shih tzu's are prone to multiple types of heart disease. The condition may have a poor prognosis depending on when it is diagnosed and the stage of the disease when it is discovered.

Brachycephaly
Due to the ideal of beauty regarding the shape of the face the skull malformation brachycephaly was increased by breeding selection. This short nose causes problems like skin sensitivities such as dermatitis, bumps, and rashes.

Eye issues
It is very common for Shih Tzu's to develop eye problems at any age, and even more so once they are older. Most veterinarians will recommend eye drops to assist with any eye irritations. Some dogs have allergies which causes excess discharge around the eye. Older Shih Tzu are known to develop cataracts which can be corrected with surgery. If not treated, the dog may become blind in the eye that has the cataract. The distinctive large eyes can easily be scratched which may cause an ulcer. The dog will normally have the injured eye closed or half closed and may have excessive tears. The most common problem of Shih Tzus concerning eye conditions is the formation of epiphora caused by the fur on the eyelids scratching the conjunctiva and the cornea. However this can be mediated by the application of prescribed eye drops from a veterinarian.

Hair issues
Untrimmed hair can be an issue. This is remedied with a top knot or a short puppy cut. Shih Tzus have hair which can grow lengthy. Long hair is required as a show coat and is required generally to be brushed or groomed once a day. Hair longer than a puppy cut often causes issues, including hair covering the eyes of the dog, preventing good visual acuity.

Ear issues
A very common issue for Shih Tzu's is the development of ear infections, as they have a long coat and hair grows in their ears. If ears are not plucked and cleaned often, ear infections will reoccur and need to be treated with ear cleaner and possibly medication, prescribed by the veterinarian. Ear infections may be spotted by an odor coming from the ears, as well as frequent shaking of the head and scratching of the ears.

Skin sensitivities
The Shih Tzu's skin is particularly sensitive and prone to allergies. Ideally, they should be bathed every two to six months to maintain hygiene and prevent skin irritations. They are also prone to stomach issues, and most have delicate appetites.