No, all the children I've had in care have been single children in their families and that's no excuse. There is good parenting, which means rules, routines and discipline and consequences or rewards for bad or good actions. Then there is bad parenting and if the parents aren't working to solve the problems do not beat your head against the wall. My clients know from the interview phase onward that we work together or it won't work. Talk to the parents about all the issues and get them on board so the child has consistency at home and at daycare.