A good game is to put the dog out of sight and hide bits of torn off schmackos all over they run round the house trying to find them and usually do !
I do that with the younger female and she very much enjoys it. The older male is of an age where he just expects to be served - He lays on his bed and awaits you taking things to him. Put his dish under his chin and it has to be placed just right, or he gives you '...that look' of that will not do for me.