List of all Dog Breeds starting with Letter O
Old Danish Pointer

Origin: Denmark.
Age: Typically live around 10-14 years.
Weight: 55-90 pounds (25-41 kg).
Size: Large, standing about 23-27 inches (58-69 cm) tall.
Characteristics: Old Danish Pointers are versatile hunting dogs with excellent scenting abilities. They are loyal, intelligent, and have a friendly and gentle nature. Old Danish Pointers require regular exercise and mental stimulation.
Old English Sheepdog

Origin: United Kingdom (England).
Age: Generally live around 10-12 years.
Weight: 60-100 pounds (27-45 kg).
Size: Large, standing about 21-24 inches (53-61 cm) tall.
Characteristics: Old English Sheepdogs, often called “Bobtails,” are known for their shaggy, profuse coats and playful nature. They are intelligent, adaptable, and make affectionate family pets. Regular grooming is necessary to maintain their coat.
Olde English Bulldogge

Origin: United States.
Age: Typically live around 9-14 years.
Weight: 60-80 pounds (27-36 kg).
Size: Medium to large, standing about 16-20 inches (41-51 cm) tall.
Characteristics: Olde English Bulldogges are muscular and athletic dogs. They are a re-creation of the traditional English Bulldog breed but with improved health and athleticism. They are friendly, loyal, and make good family pets.
Otterhound

Origin: United Kingdom (England).
Age: Generally live around 10-12 years.
Weight: 80-115 pounds (36-52 kg).
Size: Large, standing about 24-26 inches (61-66 cm) tall.
Characteristics: Otterhounds are a rare and large breed. They were originally bred for hunting otters. Otterhounds are friendly, sociable, and have a unique, shaggy coat. They require regular exercise and grooming.