oh my gosh i am so very sorry that you are having to deal with this traumatic decision after the very sad loss of you mother, as if that is not enough for you all to deal with, thank you for taking the time here to explain all to us, i really feel for you so much and i can only say i trust you will do what is the best thing for the kitties, knowing how much your mother loved them,and you loved your mother ensures only the best will be done for them , i wish you all the best and i certainly understand what a difficult decision you have ahead of you, HUGS.