For many reasons, people are not able to keep their Vizslas, and these dogs become available for re-homing. Some have had no prior training, have been abused or need major rehabilitation. Some are available because of divorce, allergies or owner's illness/death. Rarely are they puppies. Potential owners are carefully screened, and preference in rescue situations is usually, but not always, given to those who have Vizsla experience and know their energy level and needs.
There is often a bias against rescues. Many think dogs that end up in rescue are genetically or behaviorally inferior. It is not uncommon that we get highly bred dogs that have either outlived their usefulness from impulsive owners who did not consider the time, effort and expense needed to be a dog owner and/or the breeder did not screen them well.. Many prospective owners are not convinced that owning a “pre-owned” dog is better than buying a puppy.There are good reasons why rescues are often a better alternative. They are usually housebroken, past the puppy chewing stage; sleep through the night and let you finish the newspaper. Already full adult size, they have been temperament tested with known activity levels, and unless they are special needs dogs, have manageable vet bills and training needs.
Dogs who have been uprooted from their happy homes or have not had the best start in life are more likely to bond very easily with their new people. Those who have lost their families through death, divorce or lifestyle change go through a mourning process; but once attached to a new loving family, they seem to want to please as much as possible to make sure they are never homeless again.