Quoting MyloveZoZo:" You can try some pear juice. Make sure he is getting a lot of fluids. That can help loosen things up. If things don't get better go back to your dr and see what else they suggest."
Quoting crazy coupon lady:" My DD gets 1/2 c of whole milk with all 3 meals, and has water or juice at her snack times but her bedtime ... [snip!] ... lunch 3:30snack 5:30 dinner 7pm snack When DD is.constipated I give her 1/2 c of apple juice and within 2 hrs she is good"