This breed frequently exhibits a golden yellow coat, though they also come in various shades of copper, red, blue, and black. Although the Basque Shepherd Dogs coat is fairly long, it is smooth and easy to groom. Daily brushing is recommended to prevent tangles and to help control shedding. Puppies. The average litter size for the Basque Shepherd Dog is 6 to 9 puppies, with 7 being the most common.