Has he been dewormed?
Worms can cause scratching and digging and and .......
Deworm every 6 months to a year xx
good idea Anniebrooke. Post house rules on the wall with one ot them being "no butt picking". I'd make that rule numer 4 if I were the poster with "wash hands before eating" as rule number 5 in case someone in the house breaks rule number 4 . . .
I had friends whose son made a neighborhood club when the boys were around age 9 or 10. In their clubhouse was a sign that had the rules for the club that they had thought of. Rule 3 was "No picking butts."