The normal aging process of a dog can be judged based on expected life span for the breed, the general health of each individual and the owner's ability to know when the dog's health quality has changed. Older dogs can show some signs of the aging process but this does not mean the dog is ill. Your veterinarian can determine if a dog's decline is due to illness.
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Changes in Body Condition
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Most of us know our pets well enough to determine when a change has occurred in the condition of our dog's body. Do you notice that the dog is eating the same amount but losing weight? Is the dog's coat suddenly getting thin or lacking in condition? Is your dog urinating or defecating more or less often that what is considered normal? Is your dog having apparent difficulty with sight or hearing? Do you notice your dog breathing heavier than usual? Does your dog have difficulty getting around?
Any of these changes in an elderly pet should find you consulting your veterinarian. Specific blood, urine and other diagnostic tests have been designed to note changes in the condition of senior pets. Most often it is best to have your pet seen as soon as symptoms appear. If a problem is found early there is a better chance for successful treatment.
Changes in Behavior
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Some maladies and illnesses are often seen as a change in an older dog's normal behavior patterns. If your usually outgoing, active dog is suddenly lethargic and withdrawn, or showing signs of aggression, your veterinarian should be consulted. Seizure disorders, thyroid and hormone deficiencies, diabetes, some cancers and arthritis are among the common illnesses that can have an effect on temperament and behavior.
Changes in Activity Level
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As in older humans, an older dog's activity levels can change as they age. However if a sudden change is noticed, that should be mentioned to your veterinarian. Heart, lung, kidney and joint maladies are common causes of a drop in the normal activity level of an older dog. Senior diagnostics may be able to find the problem early enough for treatment to be successful.
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