My girl Buttercup does something very similar to what CavyMama's piggie does ! However, I use bird cups
( I KNOW... it
sounds weird, to use bird cups, but they have hooks on them, they work really well, and never get tipped over !!) for their pellets, and she will pull the cup 2 or 3 times toward her, every time she goes to eat some pellets throughout the day !
It is not an easy thing to do, since they have long hooks which hook on to the coroplast, and the pellet cup ends up all the way in the middle of the cage ! I keep them (2 bird cups) all the way at one end of their cage, where I feed them their plate of veggies, where their water bottle is, also.
Buttercup does something else too, that may or may not be typical, I don't know. When she popcorns, she popcorns like 7 inches up into the air ! I know it is 7 inches, because my coro sides are 6 inches, and from all the way from my chair I can see her jumps over the coroplast wall !!! My little Olympian.....
*Note* Their cage is on a stand........