My rabbit just died but she leaves behind a bonded sister of 7 years. The rabbit who died has always been interested and friendly with us but her sister has always been very tentative and shy with people. I understand that it is recommended to bring the rabbit's dead body home from the vet to let the other rabbit get closure, but unfortunately this is not an option.
How can I help my rabbit cope with the passing of her sister and recognize symptoms of depression? I feel like showering her with attention is not something she will necessarily enjoy. I could give her extra treats, but that doesn't seems like a great idea either. Should I make changes to her environment perhaps? She has free run of the house currently. Getting a new rabbit to bond with is not an option.
I know this is not an easy question, so thank you deeply for any suggestions.