Hypothyroidism More Condition_symptoms And Pregnant What Are Some Underlying Causes Of Hypothyroidism In Dogs?

What are some underlying causes of hypothyroidism in dogs? - hypothyroidism more condition_symptoms and pregnant

The vet wants to run a full blood test for my dog (nine years) to see if there is an underlying cause of newly diagnosed hypothyroidism. Does anybody know what some of the most likely culprit?