Tail low

The base of the tail covers the anus and the distal portion is hanging down. Normally the end of the tail is curved slightly upward, or the entire tail is held hanging down.
(Murphy, 1998; Goodmann, 2002; Koler-Matznick, 2005)

The female Belgian Malinois on the right is staring at the male, who is moving away, ears turned sideways and tail held low.

This female Berger Blanc Suisse has encountered a male Golden Retriever. Her ears are turned sideways and back, her tail is low, and one front paw is raised.

VIDEO

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This male Greater Swiss Mountain Dog puppy has tail low and ears back as a female German Shepherd puppy approaches. She lowers and wags her tail, and the two dogs sniff each other. The male takes a step forward and displaces the female, and the two dogs again sniff each other, circling. The Shepherd puppy moves away with head and tail low, ears turned sideways and back. When the Mountain Dog follows her, she stops him, then wags her tail, moves away and then lies down. The male puppy approaches the Shepherd's owner. The Shepherd puppy stops and exhibits self-grooming; the Mountain Dog exhibits a rear approach, and the female puppy seeks support from her owner.

tail chasing<>tail up head down