Maltipoos typically live 12 to 15 years, and the conditions most likely to shorten that lifespan are heart disease, liver problems, and tracheal collapse. Because Maltipoos are a cross between Maltese and Toy Poodles, they can inherit health vulnerabilities from both parent breeds. Understanding what those risks look like gives you a better chance of catching problems early.
Heart Disease
The single biggest life-threatening condition in small breeds like Maltipoos is degenerative valve disease, sometimes called “leaky valve disease.” It typically appears after age 8, when the valves inside the heart gradually weaken and stop closing properly. Blood leaks backward with each heartbeat, forcing the heart to work harder. Over months or years, this progresses to congestive heart failure: fluid builds up in the lungs, the dog coughs more (especially at night or after exercise), and breathing becomes labored.
Cornell University’s veterinary cardiology department identifies Miniature Poodles and other small breeds as the most commonly affected. Because Maltipoos inherit this predisposition from both parent lines, a cardiac exam is one of the recommended health screenings for breeding Maltese. If your Maltipoo develops a heart murmur at a routine vet visit, that’s often the first sign. Caught early, medication can manage the condition for years, but heart failure remains a leading cause of death in older Maltipoos.
Tracheal Collapse
The trachea (windpipe) in toy breeds is reinforced by C-shaped rings of cartilage. In some Maltipoos, these rings weaken and flatten over time, causing the airway to partially close. The hallmark symptom is a dry, honking cough that gets worse with excitement, pulling on a leash, or hot weather. In mild cases, it’s manageable with weight control, a harness instead of a collar, and avoiding triggers. In severe cases, the airway narrows enough to cause breathing crises that can be fatal.
This condition tends to worsen with age and is one of the more common reasons Maltipoo owners face difficult end-of-life decisions in their dog’s later years.
Liver Shunts
Portosystemic shunts are a congenital defect where blood bypasses the liver instead of flowing through it for filtering. Toxins that should be removed, particularly ammonia, build up in the bloodstream and affect the brain. Toy breeds are disproportionately affected, and the American Kennel Club lists a bile acid test as a recommended screening for Maltese breeders specifically because of this risk.
Signs often show up in puppies or young dogs: stunted growth, disorientation after meals, circling, staring into space, or seizures. Some dogs just seem “off” compared to littermates. Surgery to close the abnormal vessel has an excellent long-term prognosis if the dog tolerates the procedure, though toy breeds face a slightly higher risk of post-surgical seizures in the first day or two. Without treatment, liver shunts significantly shorten lifespan. With successful surgery, many dogs go on to live normal lives.
Cushing’s Disease
Cushing’s disease occurs when the adrenal glands overproduce stress hormones, usually because of a small pituitary tumor. It’s common in older small dogs, and Poodles are one of the breeds most frequently diagnosed. The symptoms are easy to dismiss as normal aging: increased thirst and urination, a pot-bellied appearance, thinning hair, and skin infections that keep coming back.
A study of 219 dogs with Cushing’s disease found a median survival time of about 17 months after diagnosis. Dogs diagnosed at age 13 or older had nearly four times the mortality risk compared to younger dogs. Treatment with medication can meaningfully improve quality of life and extend survival, but the disease is managed rather than cured, and complications from the hormonal imbalance (infections, blood clots, kidney strain) contribute to decline over time.
Dental Disease and Its Ripple Effects
This one surprises many owners, but severe dental disease is a real threat to small dogs’ longevity. Maltipoos have small jaws with crowded teeth, creating tight spaces where bacteria thrive. Without regular dental care, infection can destroy the jawbone and, more importantly, seed bacteria into the bloodstream. Chronic oral infections are linked to kidney damage and heart valve infections, both of which can shorten a dog’s life.
By age three, most small dogs already have some degree of dental disease. Regular cleanings under anesthesia and daily tooth brushing at home are the most effective prevention.
Brain Inflammation
A less common but serious risk in toy breeds is a group of inflammatory brain diseases collectively called meningoencephalitis of unknown origin. These conditions cause the brain tissue to become inflamed and, in some forms, to die (necrotize). The typical age of onset is around four years old, and symptoms include seizures, head tilting, vision loss, and unsteadiness.
About 82% of affected dogs survive the initial episode and leave the hospital, but only about 64% are still alive at six months. Pugs are the breed most associated with the necrotizing form, but it occurs across small breeds. Treatment involves aggressive immune suppression, and some dogs respond well enough to live years with the condition. Others decline rapidly. It remains one of the more devastating diagnoses a young Maltipoo can receive.
Addison’s Disease
Inherited from the Poodle side, Addison’s disease is essentially the opposite of Cushing’s: the adrenal glands produce too little hormone instead of too much. The Poodle Club of America describes it as “extremely serious” because adrenal hormones are essential for regulating blood pressure, electrolyte balance, and stress response. A dog in an Addisonian crisis can collapse suddenly, with vomiting, weakness, and dangerously slow heart rate.
The good news is that once diagnosed, Addison’s is very manageable with hormone replacement. The danger lies in the initial crisis, which can be fatal if not recognized and treated quickly. Vague, intermittent symptoms like lethargy, poor appetite, and occasional vomiting often delay diagnosis.
Screening That Can Help
Based on the health profiles of both parent breeds, there are specific tests that can catch problems before they become emergencies. For the Maltese side, the AKC’s parent breed club recommends a kneecap evaluation, a cardiac exam, and a bile acid test to screen for liver shunts. For the Toy Poodle side, the recommendations include a kneecap evaluation, an eye exam by a veterinary ophthalmologist, and DNA testing for progressive retinal atrophy (a genetic cause of blindness).
If you’re buying a Maltipoo puppy, ask the breeder whether these tests were performed on the parents. If you already have a Maltipoo, a baseline cardiac exam and bile acid test at your vet can flag hidden risks. Annual wellness bloodwork becomes especially valuable after age 7, when conditions like Cushing’s disease and early kidney changes are most likely to appear.