When my grandmother was in the facility, I believed she was always better off when my mother was there. Not because the place was bad, in fact, it was a great place, but because the staff had their limits, and I know my grandmother got better care from my mom, who was able to focus on her 100% when she visited.
And when she visited, she always made sure it was during one meal time, so she could eat with her mother, and she could help feed her and get more food into her.