My 5 year old son (with autism) is having bowel movements that are similar to powder or dry potting soil. should i be concerned?

Check with your doc: Need more fiber & fluids. What medications is he on? If your state allows medical marihuana consider getting a consult. Recent research shows good result to autism.

Should get checked o: If this has been present for more than a week, it is best to get him checked out. In the meanwhile, need to scrutinize what he eats. For example , has he been eating chalk , a lot of calcium pills, or clay?