This is it.....Your dog!!!
From now on, this is your cutie (if they are seem a lemon, remember, no dog is a lemon, just undereducated, keep training them and get professional training if necessary. No dog is born aggressive, it has to with the way they were raised, either on obedience and rules, or their natural dog, or abused instincts, if you get them as a puppy, the way they act is a result of your training, it's never the dog's fault it's yours, they're living the only way an animal knows, they don't know your human rules, you must teach them) Keep training, they like to obey, exercising, the vet visits, the socializing, and the hugs. One year of puppy training really pays off, the happy obedient dog you'll have is worth it.