There could be any number of reasons why your dog is fixated on the area behind them, but some potential explanations include boredom, anxiety, or fear. While it may seem like a nuisance at first, staring intently at the backseat can actually help keep your pet safe while traveling. When dogs are bored or anxious, they may start to behave unpredictably and this could lead to accidents. Staring out the window also offers them a sense of control and can help reduce stress levels. However, if your dog is displaying signs of fear such as being reactive to sounds or movement from behind the seat, speak with your veterinarian about possible treatments.