Canine hypothyroidism: avoiding over diagnosing the condition

In Pract. Mar 2022;44(2):68-75. 22 Refs

Susanna Spence¹

¹ North Downs Specialist Referrals, Bletchingley RH1 4QP, UK.

Author Abstract

Background: Hypothyroidism is one of the most commonly treated endocrine disorders in dogs; however, the diagnosis of this condition can be challenging, potentially leading to misdiagnosis. The clinical signs of hypothyroidism are vague and non-specific, as are the routine haematological and biochemical changes. When assessing the thyroid axis, the classical finding of decreased total thyroxine and increased thyroid-stimulating hormone is highly specific for the diagnosis of hypothyroidism, but has less good sensitivity. Although numerous other tests are available, a basic understanding of thyroid gland physiology and thyroid test methodology is needed to be able to use each test and interpret the results correctly.

Aim of the article: This article discusses how to confidently diagnose the condition, explaining how clinicians need to consider the clinical signs, routine clinicopathological changes and thyroid hormone concentrations together, rather than in isolation.

Article Tools:

Email to me

Archives Highlights:

Investigating the relationship between canine training classes and post-adoption return rates in North American shelters
Of all the returned dogs, those who attended training were more likely to be returned for owner-related reasons (58.8?%), whereas dogs who did not attend training were more likely to be returned for animal-related reasons (78.9?%). While attending training classes at animal shelters may help to reduce behavioral returns, as shown by the shift in return reasons, they do not appear to reduce return rates significantly for the general shelter population.

Risk Factors for Injury in Border Collies Competing in Agility Competitions.
The jump height relative to the shoulder height was associated with injury, with dogs jumping noticeably above or below shoulder height more likely to report a history of injury. Other identified risk factors included the number of weekends spent competing/year, the number of competitions at the national level, the age when starting elbow height jumps and backside jumps, the acquisition of the dog from a breeder, and the age of the handler.

Head tilt in 6 Ankole-Watusi cattle (Bos taurus ankole) with chronic exudative cornual sinusitis.
Clinically, 4 of the 6 cases had concurrent otitis at the time of initial clinical observation. Medical management was the standard across all cases with limited surgical success in 2 cases. Due to intractable and progressive clinical signs despite treatment attempts, euthanasia and postmortem examinations were performed.

Factors Associated with Medication Noncompliance in Dogs in New Zealand.
Medication noncompliance was recorded for 47% (71/151) of owners. Increasing dog age was associated with better owner compliance. Forty-seven percent (71/151) of owners reported that "nobody" showed them how to administer the medication. One-third of dog owners (47/151) reported challenges in medicating their pets. The most common reason cited by clients reporting challenges was a resistant pet.

Limb amputation for feline appendicular bone tumors results in excellent recovery outcomes and high owner satisfaction with a low incidence of complications.
Time to return to walking without support was < 3 days in 69.7% of cats and 3 to 7 days in 16.7%. Activity level changes were reported as no change in 75.8% of cats. There were no behavioral changes in 92.3% of cats. Quality of life following amputation was recorded as excellent in 82.4% of cats. Owner satisfaction was reported as very satisfied, moderately satisfied, or satisfied in 98.5% of cats.