Mine both stand...

But it's because they take turns. One moves back and chews
while the other gets a fresh bite, then he moves back.
The bowl is actually big enough for both to eat at the same
time.

This started when My Female Becca arrived (as a puppy).
She is My Male's Sister (a couple Liters difference).
So, he would let "his" puppy take a bite, then get one for himself,
and it's been like that ever since.

I've had people comment on how polite they are with each other...
OHHH if they only knew !!!