I feel you should talk to the owners. You are getting second hand advice from neighbors, neighbors who may not like the bird living next door. Many people let their birds out on their cages etc... although I do not agree and would rather have a cover to protect them. They should at least know what happened to their bird, not knowing can be heartbreaking. You can call the animal control and let them know your concerns about the animals possible treatment. I would also offer help to the owner about the birds placement if indeed that is what they are wanting.
