Was there no way these birds could have ridden in the passenger compartment along with the owner? Some animals are transported that way.
She paid a lot of money for a service that obviously killed her pet!! They are obviously guilty so they need to compensate her!!
The airline and the pet trans company are at fault. They should reimburse the owner for her expenses, refund the fly fee and pay the owner damages for breach of contract. [I am a lawyer.]
Wind: 7 mph