Despite a daily changing of all the waterbowls in the house for Mosca (I even bought two more for her from the super sale rack at pier one), she seems only to drink from this one:
from which she will suck down half a bowl in a sitting. It is old, chipped and filled with sediment from the mineral rich well water we have here. I keep the other bowls clean of deposits and even use filtered water in one of them, but nope, only the holy bowl gets any apparent use. I am afraid to clean it or move it, lest she turn her nose up at it too and expire of dehydration.