i was wondering when you should start tranining your puppy? also i will be brining the pup home when she is about 8-9 weeks old there is another dog in the house i will be going to and she will only have her first set of shots and was wonderig if it was ok to introduce them to each other or wait till she has had her 2nd set of shots? also there is a dog park in walking distance from our house and was wondering when it was ok to start taking her to solicize her to different dogs and people?