my son will be four soon, hes not yet fully potty trained, problem im having, he will go all day without going on the potty , he will go on it once at night time, he fills the potty up , his urine is a dark yellow, i no hes holding it in, when he wanted a drink he would say pop, now, hes not asking me for a drink at all, im having to bring the drinks to him, even then hes not drinking them all the time, has for the pooy side of things, well, he will bring me a nappy to put on, his stools are very loose, and a very strong smelly smell, even now i feel hes loosing skills as he use to tell me he had pooed by holding his noise, now he dosent even do that, he use to go on the toliet aswell, hes stopped that all together now, please any advice on what to do,