Ohh that's sad.Commiserations You do get so attached.Don't you.We have a type of opossum here[introduced from Australia] it is classed as a pest.It strips native forest and your fruit trees if you live in the country.Also eats native bird's eggs.Haven't heard of them going for adult hens but eggs would be fair game not sure about chicks.Most folks in the country use a ''Timms'' trap. Basically a plastic box with a hole one end opossum puts head in bang instant humane death! Country folk swear by an opossum under each new rose bush!We had a possum kill to of our girls. We have successfully killed one (emotionally charged due to the loss) and caught one in a live trap. Showed mercy and let him out far far away. We will continue to keep the trap set every night. We are going to build a new coop and inclosure.