OMGoodness! He really does quack!!! It's so funny -and he does it so hard, like it's a real effort for him to get it out. I don't know whether to laugh or cry for him.
Has he always done that? Did he have an injury to his throat? did he imprint on a duck at birth?
Jack the Quacker - his new name. LOL

And your baby talking hardly counts compared to some of us. It's an interesting life we live with our fur babies.