My dog's thyroid is .9. Is this low and causing his skin problems?

Question

Sonny has been having skin issues recently and at my request, had a thyroid test done at last vet appt. Test came back with a .9 score and vet says is a little low but not likely cause of skin issues. They put him on lowest dose of thyroxine for month to just see if there's a difference. How low is .9 and what does that mean? Should I be concerned? Spaniels are vulnerable to thyroid issues. Vet thinks it could be temaril P that causing low score as he was on that for itching a week prior to test. Pet's info: Dog | American Cocker Spaniel | Male | neutered | 8 years and 6 months old | 23 lbs

Susan England-Foster · Accepted Answer

A low thyroid can be due to hypothyroidism or euthyroid sick syndrome. Euthyroid sick syndrome is where the thyroid is artificially low due to something else going on in the pet like skin issues. The thyroid level Depends on the lab they use. Usually 0.9is the low end of normal (0.7) still normal. Your vet could run a free t4 or tsh for more information and confirmation of hypothyroidism

My dog's thyroid is .9. Is this low and causing his skin problems?

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