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The Beatles song "A day in the Life" has an extra high-pitched whistle, audible only to dogs. It was recorded by Paul McCartney for the enjoyment of his Shetland sheepdog.

Wow, I didn't knew it. Thank You :)

Amazing dog. If I will ever feel responsible enough to get a dog it will definitely be a husky.

Thank You :) I will post sometimes about her :) Husky's are lovely dogs :)