Nearly a year and a half after launching a pilot program in Illinois that allowed train travelers for the first time to bring along their small pets – much like they do when traveling by plane – Amtrak will expand this option to one of its busiest routes. Amtrak announced this week that passengers on two additional routes can take a cat or small dog in an enclosed a pet carrier on trips up to seven hours long, as long as they’re willing to pay a $25 fee. The expanded pet program, which will run from Oct.