Two dogs are only considered to be pair bonded if the separation of them would cause extreme anxiety or unhappiness to either one of both dogs. Any two dogs, related or not, may potentially become a bonded pair if they spend significant amounts of time together. If dogs are together from birth to six months old they are likely to bond strongly, but still remain emotionally elastic in terms of being able to separate without any huge upheaval. However, if dogs that have been raised together remain together after one year of age, they are likely to be very closely bonded by that time. Dogs under five years old are more likely to form a strong bond with another similarly aged dog than it is likely for such a strong bond to occur when older. Sibling dogs and dam and offspring bonds are strong from the start, and unless the dogs are separated and spend reasonable amounts of time apart, will likely bond firmly and quickly. If the two dogs are suddenly separated, confusion sets in as well, and both dogs are likely to find it hard to settle, as they will not know what has happened to the other party. Taking on both dogs means they are likely to settle faster, be less distressed, not pine, and be less likely to act out than if one went to a new home alone.