What is "Old Dog Syndrome"?

We have seen the cases: the poodle that wanders the house and gets "lost" in corners, the terrier that ignores his owner when his name is called - but isn't deaf, the previously well-trained schnauzer who has started having accidents in the house - right after he comes inside. These dogs are showing typical behaviors associated with a disorder called canine Cognitive Dysfunction Syndrome, or CDS. CDS is the age-related deterioration of cognitive abilities characterized by behavioral changes in dogs that cannot be wholly attributed to general medical conditions. CDS is often referred to as "old dog syndrome" or "senility". A 1998 market research study indicated that 48 percent of dogs 8 years of age and older exhibited at least one clinical sign associated with CDS.

Another study revealed that 62 percent of 11 to 16 year old dogs scored positively for one or more behavioral categories indicative of CDS. The first step in diagnosing CDS is recognition of the signs, frequently observed by the pet's owner. Next the veterinarian may conduct a thorough behavioral and medical history, followed by a complete physical and neurological examination. These can be supplemented, as appropriate, with diagnostic lab tests to identify other unrelated medical conditions that may be contributing to clinical signs. Please remember that some of the signs of CDS are also indicators of various other medical problems. If you see Fido behaving a little differently, don't just assume he's becoming senile. The behavior you're observing could be the result of a treatable condition, so please allow us the opportunity to make a proper diagnosis.

Signs of CDS

Disorientation
Wanders aimlessly
Appears lost or confused in the house or yard
Gets "stuck" in corners or behind furniture
Stares into space or at walls
Has difficulty finding the door
Does not recognize familiar people
Does not respond to verbal cues or name
Appears to forget reason for going outdoors


Abnormal Sleep/Wake Patterns

Sleeps more in a 24-hour day
Sleeps less during the night
Decrease in activity
Increase in wandering or pacing

Loss of Housetraining

Urinates/defecates indoors
Signals less to go outside

Decreased or Altered Response to Family Members

Solicits attention less
No longer stands for petting (walks away)
Less enthusiastic greeting
No longer greets owners

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