Dew claws can be removed from day one to day 5 usually without any problems in new born pups. After day 5 though when the bone starts to harden it becomes more difficult and may require stitches. Before that though it is just a mushy piece that can be tweezed or plucked out.

If your pup is not having problems then leave them alone. having the surgically removed at this point is costly and could introduce a spot to have problems such as bacterial infections, etc.