https://teamapt.zendesk.com/hc/en-us/community/posts/22296631675933--1-855-738-4188-How-strict-are-American-Airlines-with-pet-carry-on-sizehttps://teamapt.zendesk.com/hc/en-us/community/posts/22296631675933--1-855-738-4188-How-strict-are-American-Airlines-with-pet-carry-on-size