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    Ocicat

    History & Overview The first Ocicat appeared in the United States in 1964 during experiments to create Abyssinian-pointed...

    Ojos Azules

    Overview These cats usually impress one immediately with their sweet and appealing expression and their large and lovely...

    Old Danish Pointer

    History & Overview The Old Danish Pointing Dog, known in his native Denmark as Gammel Dansk Hønsehund, is...

    Old English Sheepdog (Bobtail)

    Overview The Old English Sheepdog, also known affectionately as Bobtail, is probably the most huggable breed in the...

    Optic Nerve Hypoplasia

    Overview Two important congenital disorders that affect the optic nerve and optic disk in dogs are Coloboma which...

    Oriental Fire-Bellied Toad (Bombina orientalis)

    Overview Oriental Fire-Bellied Toad (Bombina orientalis) is one of the most popular frogs in the world. Its common...

    Oriental Shorthair

    History & Overview Ancestors of all Oriental and Foreign breeds, whether Siamese or those resulting from Siamese and Oriental Shorthair...

    Osmanthus delavayi

    Overview Osmanthus delavayi has dark glossy leaves and a neat compact habit. The small white flowers are very...

    Osprey

    Overview The Osprey (Pandion haliaetus), or Fish Hawk, sights its prey while hovering, then plunges feet first into...

    Osteochondrodysplasia

    What Is Osteochondrodysplasia? Osteochondrodysplasia is a form of osteoarthritis affecting skeletal development, growth and maintenance of cartilage and bone....

    Osteochondrosis Dissecans

    What Is Osteochondrosis Dissecans? Osteochondrosis Dissecans(OCD) is a disease characterized by abnormal development of growth cartilage. It occurs...

    Otterhound

    History & Overview The origin of Otterhound is unknown. The earliest mention of Otterhound in history was in...

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