When my schnauzer was a puppy you couldn't stop him barking, he barked at everything, when it was time to eat, when we played, when he went for walks, EVERYTHING! However my pitt bull rarely barks, I think I've heard her bark maybe 3 times and she's nine months old now, and it was always over food. So I guess it just depends on the dog, my schnauzer is still very chatty and has certain barks for just about everything, while the pitt bull is always very quite. Even when we take her to dog parks she doesn't join in the commotion. So if your concerned its an issue just watch how the puppy behaves, if it seems especially lethargic and unresponsive to toys or food then you should contact a vet, like the other posters have recommended.
I cannot persuade myself that a beneficent and omnipotent God would have designedly created parasitic wasps with the express intention of their feeding within the living bodies of Caterpillars.
Charles Darwin