DOG DUCK TAR

I thought I heard DOG last week one of the mornings while he was waiting for us to dress up to get to work. Then this weekend I heard DUCK. They sound so close. He was chanting "duck" for the whole weekend. I managed to get him to repeat "DUCK" and "A DUCK". I think he was pronouncing it as DUCK. But seriously I'm not sure if he knows what is really a duck. Even when he is looking at the Dog book, he went duck duck duck. During one of the snack time, I gave him some Gerber stars. When he saw me taking the container with stars, he lifted his right index finger pointing out and exclaimed "TAR". Yes, it sounded like star minus the S.
So, is he talking yet???