This is a Labrador retriever from France with what appears to have the somatic black spot mutation that appears in golden and Labrador retrievrs on occasion. It is not inherited, but the cells where the black spots are located do not have the e/e mutation that causes the yellow to red coat. Instead, this somatic muation makes the cells E/e, which gets expressed as black or liver. These dogs are sometimes called mosaics.
It’s like someone painted a Labrador with African Painted Dog.