I have a 16m dcg who has been with me since she was 11 months old....she is the easiest little thing to take care of. Good eater, good sleeper, rarely cries etc...I am starting to get a little concerned tho. She doesn't speak at all, not one single word. Never even grunts or makes non-descript sounds. She only responds sometimes when I say her name. She doesn't seem to understand when I instruct her to do something ie. "please go get your shoes" "where is the ball" etc.....I have watched a lot of children and they all develop at their own pace...she is only with me 2x week and I don't believe socializes with any other children or adults besides her time with me so that may account for a lot it....at what point do you bring something up with the parents? I am starting to get concerned, meaning I am not noticing much improvement since she started with me, but I am not overly concerned nor am I sure there even is a problem....suggestio ns?