No it is not! Those are called dewclaws and should have been removed by the breeder when the pup was 3 days old. Very few breeds, such as the Briard can, and in fact must keep them in order to follow the standard, but these are placed and shape differently so that they are never a health hazard. In other breeds, the nail grows in a circle and, in forming a ring ends up pearcing the foot which is extremely painful. Dewclaws also often get caught in grass, tweegs, carpet (especially berber), with the result of tearing the toe, also a very painful and costly event.
Depending of the age of your pup and whether it is attached or not (whether the bone of this 5th toe is attached to the rest of the foot or if you can feel it totally lose, as if it was only hanging in the skin), your vet may be able to remove it without any anesthetics, or if you are going to sterilise your pup, you can wait until then while making sure to keep the nail short without cutting the quick (on puppies you can usually see it through the nail), and ask your vet to remove it in the same time.