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In page Basenji:

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Basenjis often stand on their hind legs, somewhat like a meerkat, by themselves or leaning on something; this behavior is often observed when the dog is curious about something. Basenjis have a strong prey drive. According to the book The Intelligence of Dogs, they are the second least trainable dog, when required to do human commands (behind only the Afghan Hound).[citation needed] Their real intelligence manifests when they are required to actually solve problems for the sake of the dogs' own goals (such as food, or freedom).