There are definitive signs that it is time to euthanize a dog, such as an inability to enjoy life and other subjective criteria, including an intuitive sense that it simply is time, explains Pet MD. Finding a trustworthy veterinarian and possibly the second opinion of another are crucial to knowing.
When a canine is not receiving enough oxygen, his gums often lose their pink coloration, signifying death is approaching, states DogTime.com. Other physical clues that euthanasia might be suitable include a terminal illness, the loss of bodily functions, a lack of appetite and substantial pain. It is important to consider whether the treatment to extend his life is affordable, as well as whether doing so is for the owner's benefit or the dog's benefit.