Wolfs are smart. A Michigan Isle Royale wolf took a polar plunge. It was walking on frozen Lake Superior but stepped on a spot that broke and fell thru. The wolf rescued itself by being able to pull out on the frozen ice.
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Research professor Rolf Peterson was flying over the area and saw what happened, “It pulled itself out by its claws on its front feet, then had to warm up and try to dry out." He took many pictures of the event, see here. Of course best for animals and people to never walk on a frozen lake.