Could my dog be in heat if her vulva didn't swell or I missed signs?

Question

My yorkie hasnt gone in heat yet and is almost a year old.. can she gone in heat without me noticing? Does the vulva always enlarge or can it remain the same size in some ocations? In case i missed the bleeding.. Pet's info: Dog | Yorkshire Terrier | Female | unspayed | 11 months old | 6 lbs

Vanessa Yeager DVM MPH · Accepted Answer

Hi and thanks for posting on Petco Pet Education Center, formerly Petcoach! Sometimes it can take a few more months for female dogs to come into their first heat. Other times a heat cycle can go unnoticed and is called a silent heat where the typical signs and symptoms of estrus in dogs are not very noticeable if at all. I would wait a few more months to see if she comes into heat. She may just be a late bloomer! Hope this helps- thanks again!

Could my dog be in heat if her vulva didn't swell or I missed signs?

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