The chicken bone story
I no longer see this family because the child has aged out (when a child turns 3, they lose our services). But I will never forget them.
The child also had an 18 month old sibling (the child I saw was 3 months shy of 3 years old) and every time I came over, the mother insisted that he did better with her not there so she was never around. One time when I was working with him (which soon became more like babysitting), his younger sibling came into the room from the kitchen, where mom was, with a chicken leg bone hanging out of her mouth. A CHICKEN BONE. This same child also has emerged from the kitchen with a bag of raw carrots.