More than 2/3 of animals are transported on just four airlines: Alaska, Delta, American, and United. United was responsible for transporting a plurality (27%) of all animals in 2017, so we would expect -- from sheer volume alone -- for more pets to die on United flights. So, the question is, "Do a statistically disproportionate number of animals die on United?" In 2017, sadly, the answer is yes.
