From the start of early civilization, dog has been man's best friend. In recent years man's interest and ability in medical fields of technology have greatly evolved. Along with this technology canine lifespans have increased. Subsequently diseases of older dogs such as cancer have become more prominant. Pets are now thought of as members of the family and because there are more options available, owners are demanding that their animals receive the best care possible. Because of these developments, the 'field of oncology is becoming vastly more important in small animal medicine.