Others set up a plan to ensure someone else takes care of them.
But in Oklahoma some pet owners are taking it a step further and deciding they want their pets to die - when they do.
Some veterinarian's in Tulsa say more and more people are asking for their dogs, cats, and even birds be euthanized and buried with them when they die.
Despite the request being against a veterinarian's code of ethics, there's not much doctors can do.
In Oklahoma, pets are considered property and owners have the right to do what they want with them.
Doctors say in some cases, especially in older animals, the decision is okay. But that isn't stopping some animal lovers from protesting and calling the whole process inhumane.
Veterinarians urge all animal owners to set up a plan in case the worst happens.
The most popular option is setting money aside in a trust fund and leaving someone else you trust in charge of your beloved pet.