Are Jack Russells a well behaved dog?

No dog is hard to train, provided the training is done with care and without violence (this includes making sudden loud noises). The younger you start, the better, but older dogs poorly trained can be turned around with love and kindness. Baby puppies shouldn't be left to cry alone for long periods (a half hour is a very long time to a baby, and possibly even longer to your neighbours and neighbouring dogs!) as this will make them insecure, and it is more difficult to train a nervous and insecure animal. Do seek expert advice; don't listen to people who are anxious to pass on wisdom they might not possess. Look at your advisors' dogs. Are they happy, playful, secure, obedient, calm and sweet-natured? Then consider the advice of their owners.