For most dogs it usually takes a few weeks to a few months to get completely relaxed in a new home. And whether the change is from fearful to friendly, reserved to aggressive, or virtually any other conceivable evolution of personality traits, the initial impressions formed by dogs about their owners, and vice versa, are extremely important to the relationship being established between the two. Each animal brings to its adopting household its own distinct personality formed by a combination of inherent tendencies, early experiences and acquired preferences and aversions, as do their human counterparts. This is what makes every combination unique, and so no two cases are the same in history or in treatment. One common thread, however, is always present.
Transitions are stressful.
They require patience, understanding, and an appreciation for the uncertainty these newly adopted animals are experiencing. Establishing regular schedules for enjoyable activities like meals, play, walks, and training can go a long way to making for a more secure, predictable, and pleasurable life together.