A case of craniothoracopagus (monocephalus thoracopagus tetrabrachius) in a dog.

This report describes a case of craniothoracopagus (moncephalus thoracopagus tetrabrachius) twin puppies in Ibadan, Nigeria. The conjoined twins were given birth to by a 7-year-old bitch that was usually allowed to stray away from home in search of food. Deformities of the cardiovascular, digestive musculoskeletal, respiratory and urinary systems are reported. This is probably the first report of craniothoracopagus twinning in a dog.