Iris has lived with us almost four months. She is the most affectionate dog we've had in a long time. She likes to be picked up and carried around, an unusual thing for a mid-sized dog. She watches television, and recognizes on the screen: dogs, horses, cats, birds, and people fighting... and tries to attack them all. She gets distressed at the sound of a baby crying on TV.
She now has a new hobby: chasing swallows across our pasture. I can't really get a decent video of her doing this because she covers so much ground so fast, but here's a short piece to give you some idea. The birds actually seem to taunt her and play along with her silly game.
Even on the 100º days, Iris will run to the point of exhaustion. If she is close enough to hear me, I can shout "Nooooooo" and she will stop. When it isn't so hot, I just let her have her fun. It's good exercise. (Ignore the spot on my lens: I've repeatedly tried to get it off, but evidently it's there to stay. It wasn't there when I bought the camera. I'll likely buy a new camera before Cliff retires, just to get rid of the spot.)