We have had this puppy for 10 weeks and we know she was taken from her mom way to early. We have started her at Pet Smart dog training. Tomorrow will be her second lesson. SHe is very mean she bites my sons feet all the time and attacks him snarling an biting if he tries to play fetch with her. We are told she needs a job but she doesnt seem to want one because if we try to take the ball or toy to throw it again and tell her to drop it she flips growling and snarling like a nut. She attacked my cat tonight luckily the cat is bigger then her and my other cat came to help but my childre arent able to defend tehmselves and i have to stand guard all the time. She is hardly ever in her cage and we try to give her attention until she gets mean which is usually at night. I am concerned something may be genetically wrong.