my dd just turned 2 in October. I dont know when to start potty training. Her older sister was a nightmare to train and still at 4.5 won't poo in the toilet and I'm seeking help for her but its put me off and I'm scared her 2 year old sister.will be the same. Is it best to just one day put her in underwear or run around with nothing on or go with pull ups? I'm not sure she would care about a reward chart she would just want all the sticker at once. Does it work if I just do it slowly such as every night after bath sit her on the potty for 5 minutes and then build it up?