<s>[INST] My 5 yrs old son s stool is grey and white. It s started with a yellowish liquid stool and now it s a more normal looking but whitish grey.....should I worry because he feels fine. Also, he was born with a kidney problem that they operated him when he was 8 months old because he was loosing it and also he doesn t eat much food.....no meat, no vegetable( only carrots and cucumber), apples, banana, peanut butter made with soy bean , hot dog, pasta( only white or with cheese) cereal lucky charms and 1 slice of Kraft cheese a day. Please let me know if I need to worry thank you. [/INST] thanx for posting query in heath care magic .there is no relationship between the colour of stool and kidney problem . And you have already mentioned that your baby was operated and treated for the kidney problem when he was young. so dont worry the colour of the stool doesnot matter as long as it is not red or blood stained. </s>