Yeah, I would also say it's normal
As soon as a puppy is born, their personality starts to shape. Their genetics play a major role when they are forming character, but you can actually control how your puppy will adjust to the environment. That means your role has a huge responsibility. The most rapid learning takes place between the 4th and 16th week in a puppy's life.
So as you see, it's very important that you are well prepared when you decide to get yourself a puppy, which I'm sure you was. You have to be committed to make the most out of this period (4th – 16th week) and you need to incorporate behavior training and personality shaping into the daily
routines you have.
This is actually very easy to do, but you have to be aware of it so that you take action and actually realize how important this short period of time is in a dog's life. The dog's mind is very open the first 15-21 days and its senses are very sharp during this period. Your dog is going to experience a whole lot of new things with you during this period, and it's important you make those experiences as positive as possible.
You should cease this opportunity and make sure you do as many things as you can the right way. During this period you will have an incredible opportunity to easily establish, shape and form your dog's habits and develop its behavior pattern.