A stud puppy is commonly referred to as a "stud dog". A puppy becomes a stud dog when the owner thinks this male dog is good enough for breeding. A good stud dog is one that's free of genetic faults and illnesses.
Out of the 12 puppies in the litter, Marco is the stud dog. Marco is the strongest, most active, and healthiest. Marco has the best genetic traits
by J&J TaBi November 23, 2018