I only remember her having pneumoia once, in that crummy hospice where the staff let it develop over time and resisted any medical help for her. We know the nursing staff did not try to fed Terri there, and the time-frame is well after the fact of Judge Greers "I don’t want anyone trying to feed that GIRL" 2001 ruling.
From the autopsy summary...
http://www.sptimes.com/2005/06/15/Tampabay/Autopsy_report_synops.shtml
Could Mrs. Schiavo eat by mouth?
No: Mrs. Schiavo would not have been able to consume sustenance safely and/or in sufficient quantity by mouth. In fact, the records and findings are such that oral feedings in quantities sufficient to sustain life would have certainly resulted in aspiration. Thus, Mrs. Schiavo was dependent on nutrition and hydration via her feeding tube.