1-year-old Teddy how long to adapt to the new owner Teddy to the new environment to adapt to how long it takes

How long does it take for a 1 year old Teddy to adjust to a new owner? A 1 year old Teddy is already a mature dog, so it takes a long time to accept a new owner, as fast as 1 month or as slow as a few months. It is recommended that the owner spend more energy and time with the dog to play and let the dog get familiar with the new home and new owner as soon as possible.