Yes that there is a blue healer, or Australian cattle dog. They are VERY protective of the owners, and their property. Her name is COOTER BROWN and she is 7 years young. She is the most playful, loving, lick you to death dog I have ever met, even to strangers when I'm present, or not present in the case of my neighbor feeding her. If she gets to know you you're fine.
On the protecting property note: About two summers ago, a friend of my neighbor, whom she had never met, came up my driveway. He saw her hanging out in the bed of my truck and decided to pet her. Like I said before she is loving and gentle, so she didn't growl or give him any signs, just waited for him to quit petting her and proceeded to give him 10 puncture wounds around his mouth.
On the good with kids note: Yes the are good with kids IF your kids do not run circles around the yard trying to get the dog to chase them. That's a natural instinct to them and they will herd the kids into a corner of the yard, nipping at their heals to get them there. I have had several kids freak out from this because she would not let them out of the corner. The nips at the ankles is where they get their name, but they are usually very light nips and will not hurt a kid. If the kid stands still and throws a tennis ball or frisbee they will play together for hours just fine.
COOTER BROWN is like the dog in the Quaker State commercial, she thinks the truck is hers. I have left the gate open to my yard by mistake for days, and will find her standing at the threshold. She will not leave the yard until I say she can. She has not and will not get out of the bed of my truck until I say she can. I can even drop the tailgate, and she will stay until I say so. I swear the dog understands over 50 words. She is the best dog I have ever owned.
Bryan