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My Dachshund has low thyroid and gains weight. Is it hereditary? Can I breed?

Updated On September 23rd, 2025

Pet's info: Dog | Dachshund | Female | unspayed | 1 year and 9 months old | 13.13 lbs

I have a AKC Registered Shaded Cream Dachshund/ 21 months old that weighs 13.13# . Intact and is on a strict diet of 1/2 cup a day of Diamond(all life stages) kibble.. Had a IDEXX complete blood panel...thyroid test level came back as a 1. She is still gaining weight, but not a lot.. Has mostly been at 13# since 1 year of age. I purchased her for breeding.. My question is, Is this hereditary? Could I still breed her?

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1 Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on February 11th, 2018

HI, thanks for using Petco Pet Education Center, formerly Petcoach! If you want to rule out hypothyroidism 100% you should have a profile done that includes fT4, TSH, T3, fT3. I like the profile to Michigan State. With that being said, hypothyroidism at 21 months old is exceedingly rare. It occurs in larger breed dogs more commonly. These dogs have stunted growth, have retention of "puppy coat," orthopedic abnormalities due to delayed growth plate closure and many other obvious abnormalities. Dynasty looks very normal. I hope this helps!

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