Sure....everybody should bring their pitbulls onto public transport....what could go wrong?!?!!? Police are investigating after a Pit Bull attacked a woman on a subway train. In a video posted to social media on Monday, the leashed dog can be seen tenaciously chomping down on a woman's foot as she rode the number 4 train, while its owner and other riders tried make it let go. The MTA prohibits dogs on subways unless kept in a container such as a bag, crate or backpack. Both the NYPD and the MTA are investigating after the video went viral on Facebook with more than 600-thousand views.