Dogs did not come into the world domesticated. They were wild, but the first dogs were still dogs. If the puppy just popped out of nowhere, there would be no one to nurse it, raise it, and would have died before any additional dogs. With that way of thinking, I can only conclude that everything died because no one was there to nurse and raise its helpless self, so all the creature around wouldn't be here to start with. It would be a barren land.

As for the egg coming before the chicken, how do you suppose an egg would be laid without a chicken? An egg would be pop out on the floor. No chicken would be there to sit on it (a death sentence for the egg). Obviously, a loner egg cannot hatch, and an egg has to come from the chicken! I have no doubts in my mind that the chicken came first.