Problems of older pets
|It is not unusual for behavior problems to develop in older pets. Many
of the problems have similar causes to those in younger pets. Changes in
the household or changes in the environment can lead to problems regardless
of age. For instance moving house, a change in work routine, a family member
leaving the home, or new additions to the family such as a baby or a new
spouse, can all have a dramatic impact on the pet's behavior. Unfortunately
our older pets are also likely to develop an increasing number of medical
and degenerative problems as they age. Any of the organ systems can be affected
and play a role in the development of a wide variety of behavior problems.
For example, diseases of the urinary system can lead to house-soiling. Diseases
of the endocrine organs such as the thyroid gland and pituitary gland can lead
to a variety of behavioral and personality changes. A decline in the senses
(hearing and sight) and the onset of painful conditions, and those that affect
mobility may cause the pet to be more irritable or more fearful of approach
and handling. Ageing pets may also develop a range of behavioral changes associated
with senility which are similar to the changes seen in Alzheimer's disease in
How can I tell if my pet's behavior problem is age related?
Regardless of age, every behavior case must begin with a complete veterinary
physical examination and a clinical and behavioral history. In addition, blood
tests and a urinalysis may be needed to rule out organ disease and endocrine
imbalances. Sometimes a more in depth examination of a particular organ system
may be indicated. Additional laboratory tests, radiographs, ultrasound, spinal
tests or brain scans may all be appropriate depending on the initial findings
and most of these will involve referral to a specialist at a University or referral
My pet is quite old. Is there any point in doing these tests? What can be
Unfortunately many owners of elderly pets do not even discuss behavior changes
with their veterinary surgeon since they feel that they are a normal part of
ageing and perhaps nothing can be done for their pet. This is far from the truth.
Many problems have an underlying medical cause that can be treated or controlled
with drugs, diet or perhaps surgery. Hormonal changes associated with an underactive
or overactive thyroid gland, diabetes, diseases of the pituitary gland and testicular
tumors can all lead to dramatic changes in the pet's behavior and many of these
problems can be treated or controlled. Fading organ systems can often be aided
with nutritional supplementation or dietary changes. High blood pressure, cardiac
disease and respiratory diseases may be treatable with medication, which may
dramatically improve the quality and even length of the pet's life and new drugs
are now available that are useful in the treatment of age related behavioral
changes associated with senility.
What are some things to look out for?
Changes in behavior, an increase or decrease in appetite or drinking,
an increased frequency or amount of urination, loss of urine control (dribbling
urine, bedwetting), changes in stool consistency or frequency, skin and
hair coat changes, lumps and bumps, bad breath or bleeding gums, stiffness
or soreness, excessive panting, coughing, changes in weight (increase
or decrease), and tremors or shaking are some of the more common signs
that you should mention to your veterinary surgeon if they develop in
What is cognitive dysfunction and how is it diagnosed?
It is generally believed that, as in people, a dog's learning ability, concentration,
memory and mental alertness tends to decline with age and this decline is termed
dysfunction. This may also be true for cats. If your dog has one or more of
the following behavior changes and all potential physical or medical causes
have been ruled out, it may be due to cognitive dysfunction:
a) Decreased reaction to stimuli (i.e. sounds, sights, odors)
b) Confusion, disorientation, weakness
c) Decreased interaction with the owners (e.g. less affectionate)
d) Increased irritability
e) Irregular sleep-wake cycles (sleeping in the day, waking more at night)
f) Increased vocalization
g) House-soiling or loss of other previously learned behaviours
h) Decreased ability to recognize commands, people, places or other animals
i) Decreased interest in food
j) Circling, repetitive and compulsive disorders
k) Decreased tolerance to being left alone
In one study of dogs that were 11-16 years of age, owners who were specifically
questioned regarding signs of cognitive dysfunction reported that 62% of their
pets exhibited at least one of the above signs.
Do pets get Alzheimer's?
Many of the same changes and lesions associated with Alzheimer's disease in
people have also been recognized in dogs and cats. When multiple behavior problems
develop and these changes progress to the point where the dog or cat is no longer
a "functional" pet, the condition may be consistent with senility
or dementia of the Alzheimer's type.
Can geriatric behavior problems be treated?
In many cases the answer is yes. Of course if there are medical problems contributing
to the behavior changes, the problem may not be treatable. The key therefore
is to report any behavioral changes in your pet and contact your veterinary
surgeon as soon as new problems arise.
In cognitive dysfunction, depletion of brain dopamine levels, may be responsible
for many of the behavior changes. New drugs are available that can successfully
treat some forms of cognitive dysfunction in dogs. Selegiline helps to normalize
the brain dopamine levels, helps to protect against nerve cell deterioration
and has few side effects. It is licensed for the treatment of behavioral problems
of an emotional origin including those listed above which are related to old
age. Nicergoline increases blood supply to the brain and also protects the brain
cells from certain types of damage due to a lack of sufficient oxygen. It is
licensed for the treatment of certain specific age-related effects in the older
dog but may also be used to treat some behavioral problems in the older dog
associated with senility e.g. loss of house-training.
Many of the behavior problems listed above will show marked improvement and
overall these dogs may become more attentive, playful and affectionate. It is
important to note that retraining and changes to the environment may also be
needed to resolve the problem. For example, in addition to drug therapy, geriatric
dogs that have begun to eliminate indoors will also need to be retrained much
like a puppy that has begun to eliminate indoors.
Dogs that develop behavior problems due to underlying medical conditions may
need alterations in their schedule or environment in order to deal with these
|| If the condition is treatable and can be controlled or resolved (e.g.
Cushing's disease, infections, painful conditions) then you must be prepared
to retrain the dog, since the new habit may persist. For example, the house-soiling
pet may have less control due to its medical problems. If these conditions
cannot be controlled, then the pet's schedule (more frequent trips outdoors),
or environment (installing a dog flap) may require attention. With conditions
that affect a cat's mobility, adjustments may be needed to the pet's environment
for example litter tray location may need to be altered (e.g. tray more
accessible) or the type of litter tray changed (e.g. a lower sided tray).
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