A United Airlines flight left Houston on Friday but soon diverted to Dallas. A Reddit user said a dog pooped in the aisle next to the first-class bathroom. United only allows service animals to be in the cabin without a pet carrier. Tap the link in our bio for more about this travel nightmare. Story by Pete Syme (Credit: GC Images) #pets #travel #travelnightmare Are you a fan of pets on flights? ✈️