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Canine Cognitive Dysfunction Syndrome
By JoAnne Giel
University of Georgia Behavior Clinic, College of Veterinary Medicine

Is your dog a member of the rapidly growing geriatric population? Chronologic age is not an accurate determinant of senior status in dogs due to their varying sizes. The following chart can help you determine if your dog should be considered "senior "or "geriatric".
AGES AT WHICH DOGS COULD BE CONSIDERED GERIATRIC
SIZE WEIGHT AGE
Small dogs (0-20 lb) 11.48 +/- 1.85 yr
Medium dogs (21-50 lb) 10. 90 + /- 1.56 yr
Large dogs (51-90 1b) 8.85 +/- 1.38 yr
Giant dogs (> 90 1b) 7.46 +/- 1.94 yr

(Goldston, 1995)


Geriatric pets undergo normal age related changes which may affect their behavior, appearance and general health. They often experience an increased incidence of disease, most notably cancer, kidney and heart disease. Behavior problems may develop in the previously well behaved older pet for a wide variety of reasons. Handouts are available to help guide you in understanding and identifying these changes so that you can notify your veterinarian early, before problems get out of hand.

As the owner of a geriatric pet you should be aware of a newly identified syndrome that can be controlled with early intervention. Canine Cognitive Dysfunction Syndrome is important to understand because it can mimic behavioral problems or disease states. It is often ignored and attributed to "old age" or "senility". We now know that canine Cognitive Dysfunction Syndrome (CDS) is a physical disorder. It is not a part of normal aging and not a component of any disease commonly seen in the older dog. CDS is very similar to human Alzheimer Disease. The brain undergoes changes in structure, and plaques of beta-amyloid (a substance not found in healthy animals) are formed within brain tissue. Alterations in neurotransmitter and enzyme function and quantity are noted within the brain and free radicals are formed in greater quantities. These alterations in normal brain structure and function can result in profound changes in behavior. These changes most frequently include disorientation, changes in interactions with family members, inappropriate elimination or changes in your dog's activity level or sleep patterns.

There is no cure for CDS. Fortunately, treatments are available that can potentially slow these processes and alleviate the symptoms commonly seen in this syndrome. Early intervention is necessary to protect from the continuing damage of neurotoxins while your pet's quality of life is still good. It is therefore imperative that you, the pet owner, are able to identify early signs consistent with CDS and report them to your veterinarian. Not every old dog will develop CDS but only a trained professional, such as your veterinarian, can make the diagnosis.

The following checklist includes behavioral changes that could represent early symptoms of CDS or a new behavior problem. It should be posted in your home and completed each month so that any progression of symptoms or new behavioral changes can be identified. Talk to your veterinarian and let him or her determine guidelines for communication and checkups.

POST THIS HANDY CHECKLIST IN YOUR HOUSEHOLD
AND RECORD ANY CHANGES IN YOUR PET'S BEHAVIOR EACH MONTH.
Bring this list with you on your next visit to your veterinarian. It may be helpful in differentiating between a true behavior problem and canine Cognitive Dysfunction Syndrome. Keeping a diary of your pet's behavior is helpful.

Date
           
Signs of disorientation
           
Wandering or pacing aimlessly            
Appearing lost or confused            
Walking in circles            
Exhibiting repetitious or compulsive behaviors            
Becoming forgetful            
Staring into space            
Changes in Interactions with Family Members
           
Less excited about greeting family members            
Less interested in receiving attention from family            
Slower to obey commands            
Aggressive with people or other pets            
Less responsive to his/her name            
Inappropriate Elimination
           
Urinating or defecating in the house            
Asking to go outside less (or more) often            
Changes in Your Dog's Activity Level or Sleep Patterns
           
Sleeping more during the day            
Restless at night            
Decrease in normal (or increased abnormal) activity            
Miscellaneous Behaviors
           
Increased barking or whining            
Exhibiting destructive behavior            
Increased anxiety or fearfulness            
Any behavior that is abnormal for your dog!            

Pet Name:______________________ Owner:_____________________________

Veterinarian:_______________________________________

 

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