Mom lives in a memory care unit that allows pets as long as the resident can take care of it. Mom is not remembering to leave down water for the cat and is mixing kitty litter with food. This cat is like one of her children. She loves it so much. How do I do this? Do I tell her in advance or does the cat just come up missing one day? I cannot take the cat but I have found a good home for her. Help! Any ideas how to do this?