Did you know a tucked tail means that a dog is shy or frightened. Although a tucked tails doens't mean aggression, be very cautious. A frightened dog will bite if she or he fills cornered or trapped.
Next, how to approach a shy dog
Please note that any information that I post here about fuzzy companions is not meant to take the place of the advice of a trained and certified behavorist, trainer or vet. The information I share is based on my experience, training clases I have taken, and books and articles I have read. My pratical experience is based on living with and rescuing dogs (and one cat) since 1990 and volunteering and working at various shelters since the mid 1990s.