We just flew home last night on SW and there was a dog on the lap of the lady sitting behind me and one on the floor with the lady across the aisle (neither had a pet carrier) The dogs were very well behaved but I was wondering what happens if the dogs needs to relieve itself? Also, on our flight down there was a child with a nut allergy so they didn't hand out the peanut snacks and we were asked to refrain from eating any snacks we brought on board that contain nuts. I completely understand and have no issues with that but then it didn't make sense that it's okay to have 2 dogs on the plane and not worry about people who may be allergic.