Size Many brands only make dog sweaters for small dogs, which means sizing can get a bit skewed. For example, an XL size you’d expect to fit a large breed, like a mastiff, is actually more ...

In dogs the effect is profound, perhaps accounting for 15 percent of dog’s size. The variant is not the result of a mutation that emerged during domestication, as might have happened.

We rounded up the best matching dog and owner sweaters, including options from Amazon as well as fashion labels such as Lingua Franca and Lisa Says Gah.

Both lighter and shorter dogs lifted their legs to higher angles than larger dogs. The little dogs seemed to be trying to leave a pee signature of a larger dog.

There's about a three feet difference in size between the world's tallest and smallest dogs, according to Guinness World Records.

Researchers have developed the first evidence-based growth standards chart for dogs.