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Spitz types are well suited to living in harsh northern climates.
They often have an insulating, waterproof undercoat that is denser
than the topcoat to trap warmth. Small ears help reduce the risk of
frostbite and thick fur grows on the paws to protect the dogs from
sharp ice. However, many spitz-type breeds retain wolf-like
characteristics such as excessive independence, suspiciousness, and
aggression towards unfamiliar humans or other animals, and can
therefore require much training before they become manageable. Some,
such as the Karelian Bear Dog, are almost impossible to train as
companion dogs.
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