With todays advances in modern medicine, dogs are living longer and healthier lives. However, the risk of developing diseases associated with old age, such as cancer, is increasing. About 1 in 4 dogs will develop a tumour during its life and almost 50% of dogs over 10 years old will die of a cancer-related disease. However it can be difficult to spot since most dogs with cancer appear otherwise happy and healthy, so regular annual health checks with your veterinarian are highly recommended to detect any abnormality as early as possible.