Blacl Canine Lab biting

Question
I have a 50 days Black Lab.  He is very active. When he is hungry too hyper active and the urge of food is too much.  He takes atleast 6 times food with foodpro(mix of chicken, meat, ostrich flesh etc). He bites when he is idle.  Otherwise he has a good behavoir. Listens to us.  Some time he taps on his fron leg also on us.  How to prevent him doing such activities.

Answer
Are you saying the puppy is 50 days old?  Everything you mention is TYPICAL for puppies.  Whenever he does something that you don't like, tell him NO and redirect his attention to something good.  He bites your hand....NO bite!....and then give him a soft chew toy that he's allowed to play with, get him excited about it....then tell him GOOD play!  If he jumps on you....OFF....