Maybe try increasing his intake of banana? This can firm up a bowel movement.

have you considered the possibility that he may have picked up an intestinal parasite? Giardia is common in kids and it results in loose bowels. Google it.
hope it helps
maria

My 23 month old son has exactly the same problem as in constant soft bowel movements. I have taken him to the doctors who initially thought that it might be a food intolerance but before we go down that route he suggested that we get his stools tested.
I will update once i get the results from this.
I also have a daughter and i never had this with her so i know that that this is not normal as he has a good diet and eats exactly what we do. Plenty of fruit and veg and also he loves bananas which dispels that theory.

Right. Bananas and plantains work for me (an adult). Also, dysentry could be another possible cause. And this is also diagnosed via stool sample.

Parasite is a possibility. You can keep him free of those by giving him diatomaceous earth food grade for humans ...more info on that at the freshwater organics website.

Also foods such as cheese and tortillas will help harden them, just make sure you don't give him too much and end up constipating him.

Stool sample came back clear. Had chat with doctor who has recommended him to a specialist. Agreed that my son is healty and active. Had to get him weighed for an up to date weight to forward to specialist. His weight is spot on for his age which is good as that means that food is not going straight through him.
Wanted to know if there were any bowel problems in the family... which there aren't...
Have been keeping a food and pooh diary to give to specialist to see if there are any patterns which at the moment there aren't. Doesn't matter what he eats the result is still the same. Diahorrhea. 2 or 3 times a day.
He also loves cheese which again dispels that theory.
Will update once we have seen the specialist.

Thanks for the update. If you have anything else you need to talk about, don't hesitate to ask. It will be interesting to know what's going on!

I know it's been awhile since this subject had a post, but just wanted to share my same problem I had with my daughter, with an easy solution.

Since birth she had soft stools that would ooze out normal diapers and it continued, I could only use diapers with elastic around the legs. Like others here, her weight gain and health and everything else was perfectly normal so her doctor said to not worry about it. I gave her a lot of apples and bananas, as well as juices, which were supposed to help harden up stools, with minimal help. Around age 2-1/2 years though, she started waking up in the middle of the night vomiting. Every night.

While at the doctor about the vomiting, we started thinking about possible food allergies. And the only thing she had consistently on a daily basis (she was in pre-school, so had a good varied diet) was milk.

I stopped the milk and all dairy products, and the vomiting instantly stopped that first night... and so did the soft stools she had all her life. She apparently was somewhat lactose intolerant at birth, which just became progressively worse by drinking milk daily, which eventually ended up with her vomiting nightly.

I'd try eliminating all dairy products for awhile and see what happens. And don't do what I did the first day... skipped the milk but brought home a cheese pizza... wasn't thinking all dairy products at that point yet.

My daughter has this too and she has been going in her pants. She was fully potty trained then in the past year she hasnt been using the potty. I called the doctor and she said increase her fat in her diet. SHe didnt even give her an appointment to see her. What should I do. What if she dose have a parisite or another medical issue?

My 2 and 1/2 year old daughter has had the same issue for about 5 months. When we first saw the doctor we took x-rays and found alot of food in her belly, the pediatrician recommended an enema thinking maybe there was a bowel blockage. That cleared her up for a couple days and she had one hard poop. Then another couple of days and she went back to loose mushy stool. Then she came down with the Rotavirus and had severly watery tan stool. This only lasted about 4 days, but it was bad! She had probiotics prescribed which were supposed to firm her up, but have not helped. We have stopped milk and fruit juice for about a week, hoping that may be the cause, but unfortunately this hasn't helped either. I am in the process of switching pediatricians because I am so frustrated with her current ped. If I find out the cause I will definitely post. I'm glad to hear I'm not the only one worrying.