DALLAS — Delta Air Lines will soon require owners of service and support animals to provide more information before their animal can fly in the passenger cabin, including an assurance that it’s trained to behave itself. The airline says complaints about animals biting or urinating or defecating on planes have nearly doubled since 2016. Starting March 1, Delta will require owners to show proof of their animal’s health or vaccinations at least 48 hours before a flight. Owners of psychiatric service animals and of those used for emotional support will need to sign a statement vouching that their animal can behave.