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Assuming the chihuahua doesn't belong to someone who likes to dress up their pet, they can loose heat much more quickly than a German Shepard for two reasons:

GSD have a wolf-like double coat, which protects them from heat loss;

Chihuahuas have a lower body volume/surface area ratio, which means that they have much less body size for the amount of skin they have covering their bodies. Because of this, they will loose heat much more quickly than a GSD so it's ideal that they wear a doggie coat during cold days.

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11y ago

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