Most importantly, you need to ask yourself who you are doing this for. As heartbreaking as losing a pet may be, you must always make sure that you are placing your pet’s welfare ahead of your own emotions.
For humans, palliative care is closely supervised by medical professionals, and the patient himself can indicate his wishes with regard to treatment. Patients often receive care in the hospital; if they are at home, their family members are often supported by special care workers, such as nurses and social workers.
Unfortunately, support networks for people dealing with dying animals tend to be much smaller. While your veterinarian will provide you with veterinary support and guidance, you will likely be your pet's primary caretaker and decision maker. Only you know how much you are capable of handling, and for how long.