After years of increasingly exotic interpretations of already-vague guidelines, the US Department of Transportation recently set forth new rules for airlines regarding service animals. The new rules define a service animal as a dog, “individually trained to do work or perform tasks for the benefit of a person with a disability.” All other animals must be checked in the cargo hold, generally for a fee. The new rule also allows airlines to place a limit on the number of service animals per passenger to only two, and they must fit within the passenger’s foot space. The revised rule will go into effect in Jan. 2021.