You said two of the colonists aren't eating. Are the others?
A common cause of this problem, that might not be obvious, is the "prison food" problem.
The game assumes that any paste dispenser that is in a prison cell is only for the use of prisoners. However, "in a prison cell" is pretty loose- it counts if there is ANY free path from a prison bed (or sleeping spot) to the dispenser that doesn't go through a door. Have you just removed a door, or have your miners caused a break in a cell wall (Maybe at a corner?)? If you don't have any prisoners now, perhaps try setting all beds and sleeping spots to be for Colonist use.
Another alternative is something that happened to me- I accidentally walled some colonists into a closed area. I wanted the base entrance to be hidden behind a cactus, not realising that Saguro catcuses block movement. That's probably not the case here, since you said they can walk right up to the dispenser and ignore it, but something to be aware of.
A common cause of this problem, that might not be obvious, is the "prison food" problem.
The game assumes that any paste dispenser that is in a prison cell is only for the use of prisoners. However, "in a prison cell" is pretty loose- it counts if there is ANY free path from a prison bed (or sleeping spot) to the dispenser that doesn't go through a door. Have you just removed a door, or have your miners caused a break in a cell wall (Maybe at a corner?)? If you don't have any prisoners now, perhaps try setting all beds and sleeping spots to be for Colonist use.
Another alternative is something that happened to me- I accidentally walled some colonists into a closed area. I wanted the base entrance to be hidden behind a cactus, not realising that Saguro catcuses block movement. That's probably not the case here, since you said they can walk right up to the dispenser and ignore it, but something to be aware of.