For pets, "means to deal with emergency situations" includes euthanasia if the procedures required for a cure are too expensive. There doesn't exist a duty to

For pets, "means to deal with emergency situations" includes euthanasia if the procedures required for a cure are too expensive. There doesn't exist a duty to spend unreasonably large quantities of resources on saving any particular animal's life, so not being able to afford that doesn't make someone unfit to own a pet. If a pet has cancer, it's okay to perform a complex surgery that could save it, but it's also okay to let it die.