I have been trying to get one for a day and there's no way to keep him sitting in the potty (For some strange reason he wants to do the business in private and runs away from you waving bye bye and closing the door after him. Yesterday I left him run with no nappy around the house while I followe with an aluminium container. Obviously, I was late and found a rather worried toddler looking at the puddle as if something very wrong had happened. I thought that was it and proceed to clean the spot. Meanwhile DS went quietly to his bedroom and then I heard him screaming as if there was a tiger in his room... well nbot a tiger but he was there creaming looking at a po crying as if some important part of his body had just fallen out to the floor. It took a bit of time to calm him down and I decided to try again this morning. Any ideas about a non-traumatic way to get the sample without creating bad associations? (I wanted to start potty training soon but this whole issue has scared so much that if he needs to do his business starts crying saying "poo" even when I have not chased him anymore after the incident last morning).
Please help