The planes of the muzzle and the top of the skull should be parallel in collies, with a slight but distinct stop. (In shelties, the planes are not parallel.) Collies in the US are sometimes reported to be over one hundred pounds, but a large collie typically weighs no more than 70 pounds. US and UK standards may differ. The UK standard calls for dogs to be significantly smaller than those under the American Kennel Club.
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