Wordless Wednesday, Outdoors With My Dog

I have 2 dogs and they each have their own personality. Dawson, the Black Lab, loves to swim, but Mr. Dublin, my Aussiedor, he is happiest when he is exploring outdoors. Whether it's running through tall grass, or creeping behind the shed, our backyard gives him plenty to explore!
Let's explore over here.
Wonder, what's in here.
Tired after all that running around.
Do you have a pet? When are they happiest?