The April, 2007 Airline Pet Travel Report contains pet incidents for the month of February, 2007.
Alaska Airlines reports the first in-cabin death that I am aware of. A pug died of unknown causes during the flight. A flight attendant administered oxygen and performed CPR but was unable to revive the pet.
American Airlines reports the death of a bulldog named Beau. The dog traveled from Miami to Las Angeles and was very ill upon arrival and subsequently died. The cause of death was listed as heat stroke. The necropsy indicated brachycephalic syndrome/airway obstruction. The temperature in Miami was 82F and 59F in LAX. American tested the aircraft ventilation and did not find any problems. This is a reminder to all owners of short nosed dogs to be very careful with travel and warm temperatures.