Short staff=neglect?

In any facility, including LTC, if things come to the level that you feel as not able to provide safe care for your patients, the best way is to tell the Powers that you've got life too and will work only, and ONLY as many hours as you'd signed for. If you're full time, it means 36 to 40 hours/week or whatever is written in your employment contract, period. Otherwise, just put your phone on silence and do not pick it up.

If within a week they don't stop bothering you, update your CV and bring up your bye-bye note. And, yeah, let them know that shortage of staff is fact of THEIR biography, not yours, and that you are not going to risk your license, your health, your life, or those of others because they are not doing what they're paid for.

Unfortunately, there isn't much that you or even your facility's management can do; you can't get blood out of a stone, and you can't create staff out of thin air. Perhaps they could look into staffing agencies or travelers, but a lot of places hate to use them because they're so expensive. Not as expensive as settling the inevitable lawsuits will be, but that would require thinking and we can't have any of that.

The joys of nursing in a for-profit system! Overworked and underpaid is the norm in LTC, even in sub-acute/rehab. You did state it's been really bad the last few weeks--did the facility recently lose some staff? Relatively short-lived staffing crises aren't uncommon, and if the place is offering something nice like a sign-on bonus, maybe things will get better soon.

For now, you could explore other options in the area, just in case you decide you have to jump ship. When you're at work, prioritize as best you can to make sure the patients who probably need you the most are seen first/most often. And when you're asked to work a few more hours or just one more shift, use the N-word: NO!