Friday, December 27, 2013

What Makes Small Dogs Small

Dog breeds under 20 pounds are small because of a single DNA mutation that puts the brakes on growth hormone production.  Because the mutation happened only once, about 15,000 years ago, we know that all miniaturized dogs are closely related.  You can't make one without another.
The mutation may have popped up in a wolf, although no living wolf
population has the gene today, or an ancient dog. People recognized
an advantage and made more.

It's not difficult to image that when people saw a teeny version of a big dog they were so smitten they wanted to make one of their own.  Who wouldn't want a portable Mastiff?   Today there are more than 25 breeds with this unique mutation.


Oh yes. And one more. The Rottweiler. Which means there's a whole lot more to learn about what makes little dogs little, and for that matter, big dogs big.

I think she looks like other miniaturized mastiff-type dogs (think Pug)
 in everything but weight.
Read more about how it works here.

2 comments:

  1. I love the idea of a smaller dog but I also love taking them for walks and things, so wonder if I would have to carry them, lol.

    Debbie

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  2. I always wanted a larger dog when I was looking around for a dog, but had to take into consideration my home and yard situation and ended up with a small dog and then a rescue both - Schipperke - at least they don't take up too much room on the bed LOL!!!!

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