karasue

I recently got a 4 year old CAG. He will not speak, only make certain noises, we repeat HELLO and others to him but he will not speak. Yesterday I left to go to work, I left, shut the door and listened. He went to town on talking. He was making all kinds of noises, whistling and saying all kinds of things. How do we get him to to this while we are there. Also, he makes a high pitched smoke detector beeping type sound. We ignore him when he does this so he understands it is bad, but he continues to do it everytime we leave his sight. One more thing, He was never taught to step up and he bites if we try to teach him. Any suggestions? Thanks!!!