Just so you know:
When a dog turns their head away from something interesting that you know they want to look at/investigate/etc, it is a sign of stress. So, good that he is behaving, but just a note to work with him to the point that he can meander through/around/be within a group of chicks or adults without the head turning away so 'I don't get tempted to be bad/play' point.
That said, as an impulsive puppy still - he is learning very quickly!! That is one thing about labs - they take forever to 'grow up/out of puppy-hood', but they have a very strong drive to please their owners, making them much easier to train than, say, a Husky who is much more independent minded (more like a cat - very trainable, and very intelligent - but that intelligence also brings more self determination.)