My Chocolate Labs hair

Question
Our Chocolate Lab is almost 6 months old. We noticed a few months ago that a small patch of hair on her back was turning slightly wavy. We thought nothing of it. But each day/week it started to go more and more down her back. Now the wavy streak goes from the top of her back all the way thru her tail. The rest of her hair is straight.
What kind of Chocolate Lab is she???

Answer
Hello, thanks for emailing, If you check a labador retriever book or online labrador breed standard you'll note a slight wave down the back is premisable. My own lab didn't have any waviness on her back as a pup but now the wave goes all the way down her back..it doesn't mean the dog is crossbred just some labs have a wave and some dont