Hi and welcome to the site. My name isXXXXX and I'll be providing medical information for you today.
You can try increasing his intake of bananas, apples and white rice. All of these foods tend to help with diarrhea. If eating those daily don't help, he would benefit from evaluation as he may have an inflammatory bowel condition or food intolerance that requires more treatment. It may also be helpful to try elimination of gluten and diary from the diet for a few weeks.
I hope these home measures are helpful.
Please ask questions if you have any.
It means testing by a doctor to see if there is an underlying medical cause for his digestive issues.
You can hid banana in a smoothie.
Bananas are the most effective at treating diarrhea.
In a blender you can smooth a sliced banana and mix it with applesauce for example. Adding some flavored yogurt and cinnamon can hide the banana.
Or bake banana bread.
It seems like you can't see what I'm typing.
Let me switch to QA mode out of chat. We can continue back and forth in QA mode although not as easily as in chat mode.
But chat doesn't seem to be working for you if you can't see what I'm typing.