If it is a young Bichon Frize, the adaptation period to changing owners is very short, only about 1-2 weeks, because the memory is not very strong yet. If it is an adult Bichon Frize, it may take a month to forget the old owner and accept the new owner. During this period, the cat may growl at its owner, mainly due to fear and alertness, so the new owner needs to spend more time in the early stages to allow it to gradually adapt to the new environment.