As mentioned, the image desparately needs fill light. As well, the child's expression is...ummm... less than ideal. More importantly however I think is the overall composition. First of all, when you did your pre-shoot consult, what did you discuss with respect to clothing? WHY did you pose them with the black dog on the subject wearing the black clothing? There's really very little famly connection here; get the couple closer together, try and mirror the daughter and dog posing, and do something to get Dad to actually look like he WANTS to be there (whether he does or not is irrelevant; he has to LOOK like he does).