Whether a mix breed from the local shelter or an expensive pure breed from the show or hunting circuit, there are some basics that apply to all. Most of us adopt a pup of an age less than four months old. This is probably the most formative age. I would like to address the new pup in two separate views, one physical and the second emotional. The physical environment should be clean, dry, and warm for the new pup.
Some people believe in what is known as crate training.
This is the use of a kennnel or cage for confinement of the pup when there cannot be direct supervision. The idea is that most pups will not dirty the confined area that they sleep and eat in. It is thought that it is easier to prevent bad habits than correct them once formed. It is like the pup's den. It can be used for confinement, no pain.