flat coated retriever average life span
1 Life Span: Average life span of the Flat-Coated Retriever is 10 to 12 years. 2  Training: Happy and enthusiastic, the Flat-Coat is up for anything his owner wants to teach him, and he learns quickly. 3  He tends to get bored easily, so lessons should be short and motivational. Without enough exercise and mental stimulation, he can become anxious and even destructive. 2  Grooming: The Flat-Coat has a naturally lustrous coat that needs only occasional brushing and combing to keep him looking great. 3  Life Span: Average life span of the Flat-Coated Retriever is 10 to 12 years.