Border Collies can herd livestock with their intense stares. Due to pigment dilution, Border Collies sometimes have merle coats. Merle coats can cause deafness and blindness in their offspring, so they're often bred with others.
Aussies were bred in the US to herd sheep, despite their name. Another breed with merle coats. They have gorgeous almond eyes in brown, blue, amber, or any combination.
Catahoula Leopard Dogs have varied appearances. This rare Louisiana state dog is a mix of breeds. Its merle, leopard-like coat has unique markings. These guys appear to be all-seeing.
The "wiener dog" Dachshund can have unique eyes to match its unique body shape. Merle coat dogs can have partial or full blue eyes, but their eyes are lively and friendly. These playful pups make great family pets.
The "Gray Ghost" Weimaraner has a beautiful silver-gray coat. They are born with brilliant blue eyes that change at 6 weeks. Adult Weimaraners may have light amber, gray, or blue-gray eyes.
The Cardigan Welsh Corgi's coat comes in red, sable, brindle, black, blue, and merle. He's surprisingly stocky and athletic. Blue-merles' big bat ears and blue or mismatched eyes make them irresistible.
Black and white spotted firefighting dogs are easily recognizable. Although rare, baby blues may indicate hearing loss. They're noble and athletic. They're good watchdogs, jogging companions, and loving pets.