Consider the cat that stops using the litter box. A traditional veterinary exam might look for urinary tract infections or kidney stones. But a behavioral veterinarian looks deeper. The act of urinating outside the box is a behavior, but the cause might be:
A sudden onset of defensive aggression in a normally gentle dog often points to localized pain, such as osteoarthritis, dental disease, or spinal discomfort. wwwzoophiliatv sex animal an