Clinical Signs of Canine Hypothyroidism

AKC Gazette - July 2003  pp 48-51   Coping With Thyroid Disease

 

Behavioral Problems
aggression / fearful / shyness / hyperactivity / lack of concentration / fly catching (biting at imaginary flies)  / star gazing (staring in space) / inappropriate elimination (urine, feces)

Neuromuscular Problems
seizures / mental dullness / exercise intolerance / neurologic signs polyneuropathy / lethargy / weight gain / cold intolerance / mood swings hyperexcitability / stunted growth / chronic infections

Dermatologic Diseases
dry, scaly skin and dandruff / coarse, dull coat / bilateral symmetrical hair loss / rat tail, puppy coat / hyperpigmentation / seborrhea or greasy skin pyoderma or skin infections / myxedema / chronic offensive skin odor

Alterations in Cellular Metabolism
weakness / stiffness / laryngeal paralysis / facial paralysis / tragic expression / knuckling or dragging feet / muscle wasting / megaesophagus / head tilt / drooping eyelids

Reproductive Disorders
infertility of either sex / lack of libido / testicular atrophy / hypospermia aspermia / prolonged interestrus interval / absence of heat cycles / silent heats / pseudopregnancy / weak, dying or stillborn pups

Cardiac Abnormalities
slow heart rate (bradycardia) / cardiac arrhythmias / cardiomyopathys

Gastrointestinal Disorders
constipation / diarrhea / vomiting

Hematological Disorders
bleeding / bone marrow failure / low red blood cells / low white blood cells / low platelets

Ocular Diseases
corneal lipid deposits / corneal ulceration / uveitis Keratococonjunctivitis / sicca or dry eye / infections of eyelid glands (Meibomian gland)

Other Associated Disorders
lgA deficiency / loss of smell (dysosmia) / loss of taste / glycosuria / chronic active hepatitis / other endocrinopathies adrenal, pancreatic, parathyroid