It will not know how to take care of itself when released in the wild and it will not know how to interact with members of its own species. Wariness of people and their pets is important to the survival of all wildlife. Not everyone is friendly toward animals. Unlike our pets, wild animals are not vaccinated for diseases, or dewormed, nor do they see a veterinarian regularly. Consequently, wild animals may carry infectious diseases and parasites that may be harmful to you or your pets.
Zoonotic diseases are diseases that can be transmitted from animals to people.
Some of these, such as rabies, can be lethal to humans. Wild animals can carry the same diseases that some of your pets are susceptible to, such as distemper. Make sure your pets' vaccinations are up to date. Wildlife rehabilitators are trained to know the necessary precautions to take when handling wildlife. Do not put yourself at risk by attempting to care for wild animals.