4: Flat Coated Retrievers

A UK study was released that showed more than 50% of all Flat Coated Retrievers die of cancer every year! The reason? The breed is highly susceptible to Histiocytic Sarcoma. This type of cancer is extremely aggressive and often times fatal.

The disease has been found in breeds as young as 3 years old but is more common in middle-aged and senior dogs. The underlying cause for this disease is unknown; however, hereditary factors are suspected based on the aforementioned breed predispositions.