French Bulldogs will be sad for a while when their owners change, because French Bulldogs are very smart dogs. They will need a period of time to adapt to the sudden departure of their owners and the change of new environment. During this period, they will suffer from loss of appetite, Reluctance to move and prefer to stay in quiet corners. At this time, the new owner needs to comfort the French Bulldog more, interact and play with them more, divert the French Bulldog's attention and reduce the sadness.