Helping a dog feel secure in a new environment is one of the biggest challenges owners face, whether they have brought home a rescue or a carefully selected puppy from a breeder. But, according to one expert, there are clear behavioral clues that reveal when a canine has finally relaxed into family life. More than 56 million U.S. households own a dog, according to the American Veterinary Medical Associatio n, and approximately 2 million canines are adopted each year, states the American Society