|“The smallest feline is a masterpiece.” – Leonardo da Vinci – cat quotes. The Birman is an imposing cat and medium to large in size. The fur does not mat easily. The head is round and broad. The Birman has a well balanced personality it is said.They have a “peaceful nature”. This makes them suitable for families who have children, other cats and dogs. Although Gloria Stephens in legacy of the cat says that this breed is “resistant to disease” and “robust” a report says that it suffers from inbreeding (this may be USA related and not UK – see Birman health). Inbreeding can lead to genetic diseases.