Back now with those new conc about putti your pets airplane after a meranian D during a delta layovern Detroit. ABC's erielle rf is here with the story. Go morning, erielle. Reporter: Good morning to U. The Fam tells me their dog T that required checkup just days be the flight and had clean B of health. They say they paid $275 fly the pup but what they price this morning, Micha is devastated after hisbeved pomeranianjandro die during a transfer a delta air lines flig The dog I not a pet. He is family member. We are just lostithout answers. What happened to our dog? Reporter: The 8--old dog was shipped in thego HOL aboard a flight F Phoenix to Newark but had a layover in Detroit, Michigan. Michael was plannin pick the pooch in Newark. But Detroit, a terrible discovery. At approximately 00 in the mog,lejandro W checked on and then at approximately 8:30 in the morning the dog was again C on, he was dead and there wait in the cage accoto delta. Reporter:alejandro's owners ring Evan o'shan, the S attorney whoepresenteded family who lost this bulldog after there told by flight attendant to put it I an overheadbin. He demanded to see pomeranian. We would likeee the dog now. Yeah, we dn't want do that. C S the dog? For a criminal investition after Alejandro's body was handed over in a garbage bag. Delta says it has launched its own investigation telli ABC news that it is conducting a orougheview of the situation and havbeen working dry withalejandro's family to support them however we can. Michael tells M he's still in on an necropsy to see how dog died. While they're dtating for families they are rare. Out of the mor than half a millmals transported ondo mess tick flights last year, 24 died. It is the summertime. A lot travel and want T take their pets. The do? We talked to a T. Dog.dot send it independently O rle. Try to make sure it' within your eyesight and alsook flight tass are direct, don't any layovers. If you he layovers make sure ey're short and not in pla where the tarmac get excessy cold O hot and rnerly check the Rd of the airline when it comes T traveling with pets. Erielle, thank you very much. Ways sad, though. It is good advice for everyoneav we feel sorry for the family of course.