Do I understand that petition correctly?... that they may remove Terri and into protective custody on the basis that "abuse" has occurred by their administering morphine? Is that correct?
Not exactly. The way I read it, it's saying that because Terri is being given morphine for pain and other pain medications monthly (for her menses) that she is obviously aware of pain and is pained and therefore, is unlikely to be PVS, which bars any reason for legally removing her feeding tube in the first place. The morphine also will inhibit respiration, so it would even further the point that she is unnecessarily receiving it, putting her in further danger of succumbing.
Yes, they may take her into custody on the basis of neglect as well. Plus they pulled her tube on the basis she is PVS and doctor today said she most likely is not.