DS2 has my husband's bum, which is to say that it's flat as a pancake. His Pampers Swaddlers keep sliding off his flat bottom, which has led to some unfortunate poo incidents. Anyone know if other diaper brands are better for flat-bottomed babies? DS1 didn't have this problem so we assumed the same Pampers Swaddlers he used with success as a newborn would work for DS2, but I think we need to try something else!