I do think that food aggression is pretty common in a multi-dog household; for sure, you are not the only one with this problem.
I feed mine separately - Lucy in her crate and Ringo in the kitchen. After dinner, each will go over and lick the other's bowl.
Low-value chew sticks can be left about - but high value treats (bully sticks, etc) will be given separately in their crate.
Keep an eye on it and I would take this time to work on Nothing in Life for Free training with your aggressor.
Most likely, neither one will be interested in baby formula so you will have some time to settle things down.
Good luck.
__________________  Mommy to Lucy, Ringo, and Matthew |