Hi this is our first post we gave my parents a patterdale/ lakeland 4 weeks ago it is now 12 weeks old, it seems lovely with people and great with our 11 year old girl but it will not be worked, the pup is not good when you try and stop it from chewing things that it shouldnt,it growls and pulls back it lips,shows teeth and bites hand or will snap at your face, i think i have made big mistake getting this pup, i am experienced lurcher and parsons owner but have not had much to do with patterdale/lakeland, will pup out grow this or is it bad sign of aggression in this pup, the breeder showed m