FWIW, here is the text of a Catholic Living Will, which discusses the issue of artificial feeding vs. excessively burdensome or disproportionate means. Since the Schindlers are Catholic, and Terri was raised Catholic (I don’t know if she was practicing at the time of her brain injury), this at least explains where the Schindlers are coming from:
CATHOLIC DECLARATION ON LIFE AND DEATH
of (Name)_________________________________
This Declaration of Life and Death, made while I am of sound mind, is intended to convey my desires and directions regarding treatment or care for me in the event I become irreversibly and terminally ill.
Because of my Catholic belief in the dignity of the human person and my eternal destiny with God, I ask my family, physicians, lawyer, pastor, and friends to fully inform me of my condition and prognosis, if I should become irreversibly and terminally ill, so that I can prepare myself spiritually for death.
I have the right to make my own decisions concerning medical treatment that might unnecessarily prolong the dying process beyond the limits dictated by reason and good judgment. This Declaration applies in the event that I have an incurable injury, disease or illness from which I will inevitably soon die, as determined by two physicians who have examined me, one of whom shall be my attending physician; the physicians have determined that this condition will cause my death even with appropriate medical care; and that the use of life sustaining procedures would serve only to artificially prolong the dying process. In that event, if I am unable to make my own decisions and have no reasonable expectation of recovery, then I request and direct:
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that my pain be alleviated.
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that no excessively burdensome or disproportionate means be used to prolong my life
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that nothing should be done with the intention of causing my death.
I believe nutrition and hydration are generally not excessively burdensome or disproportionate, whether being administered orally or artificially. Therefore they are not to be withheld or withdrawn from me unless there is clear and convincing evidence, in the judgment of my physicians, that they would cause me harm, cannot effectively sustain life or are excessively burdensome to me.
There is another section that deals with appointing a surrogate to make the decisions for you in case you are incapacitated.