Friends back. One of the more intelligent cats (Kurt the Havana) already responds to 'Accio' - along with the temptation of treats it's the only way to get him down off the top of the curio cabinet.
'Play Dead' ought to be 'Avada Kedavra' - but I really don't think I could bring myself to utter an Unforgivable even in fun.
Stupify = Stop Petrificus = Stay (Totalis = 'and stop wagging that tail') Accio = Come
That leaves 'Down', 'Sit' and 'Fetch' - any suggestions?