My Mr P likes rodent marbles, a crunchy ball-shaped thing in 3 flavours, got them from P@H, sunflower seeds, and the odd yoghurt drop, which I break up into quarters, and he only gets these occasionlly, as they are really sweet - he goes nuts when I open the treat box and he can smell them. Same for raisins, I get the mini organic ones in tiny boxes (for kids lunchboxes), but I still snip them into tiny slivers so that 1 raisin will last for a decent training session