Dogs growl for a variety of reasons, and it is important to understand the context in which the growling is occurring in order to determine the cause. One possible reason that a dog may growl when kissed is due to discomfort or fear. Dogs may growl when they feel threatened or uncomfortable, and kissing may be perceived as an aggressive or dominant behavior. This is especially likely if the dog is not used to being kissed or if the kisses are forceful or prolonged.
Another reason that a dog may growl when kissed is due to possessiveness or jealousy. Dogs are social animals and can become attached to their owners or other family members. If a dog perceives that someone is attempting to take their attention away from them or is engaging in affectionate behavior with someone else, they may growl as a way of expressing their possessiveness.
It is also possible that a dog may growl when kissed due to pain or discomfort. If a dog is experiencing physical discomfort or has an injury, they may growl when touched or handled in certain areas. In these cases, it is important to seek veterinary care and to avoid engaging in activities that may cause further discomfort.
It is important to remember that growling is a natural behavior for dogs and should not be punished or ignored. Instead, it is important to pay attention to the context in which the growling is occurring and to take steps to address the underlying cause. This may involve providing additional training or socialization, seeking medical attention, or adjusting the behavior of the person interacting with the dog. By understanding and addressing the root cause of the growling, it is possible to build a stronger and more positive relationship with a dog.