Photographer Dan Borris came across his yoga dog 5 years ago, an English Bull Terrier 'Otis'. A dog who not only played around his owner while she practiced yoga but gradually started to imitate her.

"At first he tried out simple poses, ones that came naturally to him like Downward and Upward Dog. As time went on Otis's poses became more and more complex, until finally he began his own practice. While Otis himself wasn't captured on film, he did lead Dan on his path to finding other four-legged Yogis." describes his website.

These images became calendars, and not only for dogs, Dan has created a 2012 calendar for cats (Yoga Cats & Kittens) as well.

Here are some of my favorite Yoga Dogs: