Hypothyroidism usually occurs in middle-aged and older dogs, although the condition will sometimes be seen in younger dogs of the larger breeds. Neutered animals of either sex are also frequently affected, regardless of age. The following are clinical signs of hypothyroidism in dogs:

Lethargy, lack of endurance, increased sleeping.

Reduced interest, alertness and excitability

Slow heart rate, weak apex beat and puls, low voltage on ECG

Preference for warmth, low body temperature, cool skin

Increased body weight

Stiff and slow movements, dragging of front feet

Head tilt, disturbed balance, unilateral facial paralysis

Atrophy of epidermis, thickening of dermis

Surface and follicular hyperkeratosis, pigmentation

Puffy facy, blepharoptosis, tragic expression

Dry, coarse, sparse coat, slow regrowth after clipping

Retarded turnover of hair (carpet coat of boxers)

Shortening or absence of estrus, lack of libido

Dry feces, occasional diarrhea

Hypercholesterolemia

Normochromic, normocytic anemia

Elevated serum creatinin phosphokinase

 

 
 
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