Seeing a veterinarian before adopting a pet may be the best way to ensure a good fit between a family and the animal they welcome into their home, writes veterinarian Cynthia Maro. Owners should be prepared for the cost of veterinary care, and a busy lifestyle, allergies or other issues may rule out certain types of pets altogether, according to Dr. Maro, who recommends guinea pigs for homes with children, fish as starter pets for people who are willing to handle tank maintenance, and certain reptiles as low-key companions — provided good hygiene practices are followed.