Once clients make a decision to expand their family with children or pets, veterinarians can be instrumental in providing education and support to make the additions successful. Veterinarians should remind clients to make changes in the household well in advance of the new addition’s arrival, to be patient, to make all introductions safe and controlled, and to reward good behavior. If problems arise, owners should be advised to separate those involved and get behavioral treatment as soon as possible. Through these simple steps, veterinarians can increase the likelihood that clients will be able to integrate new family members successfully.