[yorkietalkjilly]

A few aggressive type puppies might come in telling you all about it but most don't express themselves vocally until they begin to settle in and feel more comfortable. Some whine all night the first night and others don't - and start in later when they don't want to sleep in their crate but want to stay with you. At 9 weeks, your puppy is such an infant he's usually still with his mother at this age, getting her guidance and such as his brain develops and learns about fear and other basic concepts that he doesn't develop in the earliest weeks. He could just be coming to understand fear and is figuring out what can hurt him and how to stay safe, etc. Be very cautious that he doesn't have any shocks or very negative experiences during the next 3 or 4 weeks as his brain continues to inprint, i.e., don't take him out to meet lots of rowdy dogs/people or groups of children, be around loud equipment or loud rock music, that kind of thing. Just like we protect our infants from those kinds of experiences when just home from the hospital, so should we allow our baby puppies to slowly adjust to the world. Read all that you can on brain imprinting in young puppies on Google also. Many articles from respected dogcare websites can tell you more about the stage of development he is in.