i have a 11 year old girl who is 10 stone and 11 pounds so she is nealy 12 stone i am only 21 and i am only 10 stone her bum is like 10 foot behind when she needs go toiet for a poo she cant make so she does what ever she needs in her nickers.i have had anogh off cleaning her nickers and getting the poo out she dosent car if she does it can someone help me ?