The Bichon Frize enters the crazy phase 3 months after birth and continues to grow until the 8th month. This period is the best development period for the Bichon Frize. It will experience body growth, fetal hair replacement, and head broadening. Changes, if the owner wants to train the Bichon Frize, he can start when he is 5 months old. You can teach your Bichon Frize simple movements first, and then increase the difficulty as he grows older.