Adoption Process. Requirements can vary greatly by agency. Some may ask that the family has a fenced in yard, or another suitable outdoor space for the dog, especially in the case of large breeds or those who require a lot of activity. Bringing a new dog into the home through adoption can take anywhere from a few days to several weeks, depending on the specific requirements of the agency. During this time the agency will follow up with any questions or concerns. The process may seem long but it’s all done with the best interest of the dog and owner in mind.