I too remember the STRUGGLE right before my daughter turned 3. Pooping in the potty was terrifying for her...she would sit on the potty screaming, "I'm scared! I'm scared!" Here is some advice for maintaining the relationship with your child (because in the end he/she will be potty trained but what will your child ultimately believe about you in response to how you have handled the trials/challenges of raising him/her):
1) You and your child are the BEST judge on when is the time
2) As a parent, don't let expectations for when developmental milestones shoud happen (often dictated by books, well-meaning friends and family) cause frustration and disappointment for you and your child - remember, children are continously evaluating you on whether you truly accept them or not! They don't care what Aunt so-so or their best bud's Mom thinks (although you might) - they care what you think!
3) Put yourself in your child's mind - you been doing this potty business forever...for the first two to three years you have been telling them to stay out of the potty - now you want them to sit on it....very confusing!
4) Children learn through play - they deal with everything through play - make potty training playful. When I felt like I had hit that "wall" in potty training (no pooping in the potty) - I went looking for a game / some kind of play. I found "Sneaky Poo!" Poo-poo is sneaky...because sometimes it feels like he is coming out...but then he sneaks away or, sometime he sneaks up on us and just sneaks out. So "Sneaky Poo" gave my child and I a dialogue of how to talk about bowel movements and what was naturally occuring in her body. When she felt "Sneaky Poo" we would go to the potty and with smiles and giggles we would say, "Let's get that sneaky poo!" She loved it!!! Now, she was in control and it was no longer some strange uncontrollable thing happen to her. In addition, we went to the dollar store and she picked out 10 sneaky poo prizes - everytime she got sneaky poo in the toilet - she picked one of her prizes. She had it down by about prize 6 and most importantly...I was trustworthy and safe to her! That is so important!
Good luck...this to shall pass! (Couldn't help the pun!)
Happy Thanksgiving!
K.