Khaberni - Dog behavior is closely related to their physical and mental health, with any sudden change in behavior potentially indicating a hidden health problem more than reflecting their nature or training.
Although dogs are known as "man's best friend," veterinarians warn that pain, illness, or hormonal disorders can sometimes lead to unusual aggressive behavior.
Shauna Walsh, a veterinary nurse at the PDSA, explains that sudden aggression in a dog can be alarming, but it generally does not mean the animal is "bad," rather it indicates a health disorder or feelings of pain or fear.
Health reasons that may increase dog aggression
Veterinary reports suggest several health factors that could be behind this behavior, including:
Neurological conditions:
Diseases of the brain and nervous system can clearly alter a dog's behavior. For example, dogs with epilepsy may show aggression after seizures, and sudden behavioral changes such as confusion, anxiety, or aggression can be early signs of brain tumors. In older dogs, dementia may be linked to increased stress and a sense of danger.
Pain and injuries:
Pain is one of the most common triggers for aggression, as injuries such as wounds, broken bones, or joint and dental diseases make a dog more sensitive and less tolerant, which may reflect in aggressive behavior.
Hormonal imbalance:
Hormonal disorders can affect a dog's mood and behavior. Hypothyroidism is one of the main conditions that can cause irritability and aggression. Cushing's disease, caused by increased cortisol hormone, could lead to sharper behavior especially in food-related situations.
Infectious diseases:
Some infectious diseases, most notably rabies, are serious causes of behavioral changes, as the disease may present as lethargy or severe aggression due to its direct effect on the brain, and it is often fatal after symptoms appear.
Sensory loss:
Weakening of vision or hearing can make a dog feel fearful and confused, which makes them more likely to display aggressive behavior due to a loss of a sense of security in their surroundings.
Side effects of medications:
In some cases, certain medications may contribute to increased irritability or aggression, especially those affecting the nervous system or brain chemistry, such as corticosteroids and some anticonvulsants.
- When should you be alert?
Experts emphasize that monitoring behavioral changes in dogs is essential, especially if they appear suddenly, as they may be the first sign of a health problem that requires quick veterinary intervention.
- Early signs that should not be ignored
Specialists note that dogs often show warning signs before exhibiting any aggressive behavior, such as yawning without fatigue, avoiding eye contact, licking lips, body tension, tail tucking, and trembling.
If these signals are not understood, they may develop into clearer behaviors such as growling, baring teeth, biting, or lunging.
Veterinarians advise calmly dealing with these signs, by removing the source of stress and giving the dog space where they feel safe and calm, to avoid escalating aggressive behavior.
