Have been potty training DS (3) for a week and pees seem to be ok but poo's are a whole different story. First couple of days he did a poo on potty and then next day he didn't do one, since then he has either held it on and not done a poo or done it in his pants, He didn't do a poo all weekend and then today he did one in his pants and one in the bath so not even trying to get to potty anymore with his poo's. What can I do about this, would really appreciate advice as it's really demoralising me.