Many dog owners have the same question: why does a Newfoundland sometimes change temperament or become listless after being kept for a period of time? What exactly causes that?
Raising the Newfoundland Without Scientific Standards
Allowing dogs and cats to eat freely without control can easily lead to obesity, which is similar to the so-called "disease of affluence" in people.
Obesity brings many hidden diseases to dogs and cats, including heart disease, fatty liver, endocrine skin disease, diabetes, and joint disease. Many fatal pet illnesses are related to obesity.
Failing to Vaccinate and Deworm the Newfoundland on Time
If a pet is not vaccinated promptly after arriving home and is not dewormed regularly, many health risks can follow, and in severe cases the owner's health may also be affected.
Lack of Safety Awareness Around the Newfoundland
Most pets are curious and active, and their intelligence is roughly comparable to that of a very young child, so they do not understand danger. If the owner lacks preventive awareness, the pet is exposed to all kinds of risk.
Walking a dog without a leash can lead to traffic accidents or fights with other dogs. In a high-rise home, forgetting to close windows can create a falling risk for cats. Some indoor plants, such as lilies, are poisonous to cats. Many household items such as needles, thread, or chemicals can also be swallowed by mistake.
Not Neutering or Spaying at the Right Age
Some owners wrongly believe sterilization is inhumane, but delaying it may increase later-life risks such as mammary tumors or uterine infection.
Giving Medicine to the Newfoundland Randomly
Owners often use the wrong medicine, the wrong dose, or the wrong course of treatment. Sometimes they even choose a completely inappropriate drug. In mild cases this delays treatment, and in severe cases it can endanger life. For example, when a Newfoundland shows tearing, a dry nose, clear nasal discharge, sneezing, coughing, slightly low spirits, reduced appetite, yellow urine, or dry or soft stool, many people assume it has a simple cold and give human cold medicine. When that fails, they only then visit a veterinarian and miss the best treatment window. In reality, these are often signs of a "false cold" caused by something else.
Feeding Human Food to the Newfoundland Recklessly
Giving dogs inappropriate foods such as chocolate, grapes, or onions can cause poisoning. Chicken bones, fish bones, and different kinds of nuts can damage the esophagus or digestive tract. Large amounts of liver together with carrots may cause vitamin A toxicity. Long-term feeding of leftover human food can lead to malnutrition and nutritional imbalance.
Ignoring Health Checks in Older Pets
By the time many owners notice obvious problems and go to the animal hospital, the dog may already be in the late stage of heart failure, kidney failure, or another geriatric disease. Even the best veterinarian may have very limited options at that point. That is why a full annual health check is essential once a dog reaches about seven years of age.
Ignoring Socialization Training for the Newfoundland
If dogs or cats are never allowed to interact with outsiders, they may become timid, closed off, and overly sensitive. If owners respond to mistakes only with beatings rather than with proper behavioral training, the pet loses its sense of security, becomes hostile to strangers, and is more likely to actively attack people or other animals, causing neighborhood disputes.
The Rising Number of Newfoundlands and a Chaotic Market
Dog ownership has become an industry. As Newfoundlands are introduced, exchanged, bred, and sold more rapidly, some people end up buying sick dogs from the market. A few days after arriving home, these dogs may develop nasal discharge, coughing, vomiting, or diarrhea, and many die within about a week. Such dogs are often called "week dogs."
Poor Vaccine Quality or Improper Vaccination
The market contains fake or unqualified vaccines, which can result in poor protection or outright immunization failure. Some owners also assume that a Newfoundland that never goes outside and never touches other dogs cannot get sick, so they skip vaccination or fail to follow the schedule and miss the best immunization window. That can leave the dog exposed to fatal infectious disease.
Excessive Cleanliness Can Also Cause Illness
Some owners wash their dog's feet every time it comes home and give baths every few days. A clean-loving owner is lucky for a dog, but if the owner uses soap, laundry detergent, dishwashing liquid, or disinfectant to bathe the dog, the result can be serious. These products destroy the normal physiological state of the Newfoundland's skin, lower its natural resistance, and can trigger allergy, dermatitis, eczema, folliculitis, mite infection, ringworm, bacterial infection, itching, hair loss, and coat breakage.
Pursuing "Freedom" Too Recklessly Leads to Accidents
Many people treat dog walking as simply "letting the dog run free." Once the Newfoundland is allowed to roam uncontrolled, it may run into the road and be hit by a car, get injured in fights, bite adults, frighten children, or contaminate the environment through random elimination. If one of the dogs it meets is sick, close contact or sniffing infected waste can also threaten the health of a healthy Newfoundland.