So Fate, the precious little thing that she is, has a particular way to eat. She eats to the left.
Seriously, she only eats the left side.
She'll start of eatting the left side of the bowl. Then, since she's incapable of eatting the right side, she swings around to the side of the bowl so that she can eat the upper left corner. Then there's a quarter of her food left, but she just doesn't know how to reach it!!! What's a girl to do? Go eat your sister's food, that's what.
This is when "the switch" occurs. Tahoe and Fate just switch bowls. No looks, no noises. They just move. It's quite funny to watch!