I train my girl when she is 9 months old, u need to sit in front of her and talk to her, so that the baby won't afraid the new way to poo poo.. and when u know your baby acts like poo poo, bring her to the toilet immediately and after a week she will get used to it.
MY daughter was used the potty sucessfully since 6 months..Start the training ASAP. so when u saw she want to pass bowel, then let her sit on the potty...