Start with a weighed total, not a filled bowl
Eyeballing a bowl is where unfair feeding begins: the amount drifts up on generous days, and whatever the total, the boldest rat reaches it first. Weighing the group's dry ration on kitchen scales gives you a fixed daily total based on the number and size of your rats — adult rats typically eat a modest handful of dry food each per day alongside their fresh extras. Fix that total and hold it steady for a fortnight before judging it. What you are really managing is distribution, not quantity: in most groups the total is already about right, it is simply landing in the wrong stomachs.
Scatter widely so there is nothing to guard
A bowl is a single point that one rat can sit in — and dominant rats do exactly that. Instead, scatter the bulk of the weighed ration through the cage substrate, across hammocks and shelves and into dig boxes, so feeding becomes a group-wide forage. Reserve the pieces every rat wants most for several separate micro-piles, one per rat plus a spare, placed at opposite ends of the cage. The dominant rat's carry-off strategy collapses under this layout: he can pouch one pile's worth and dash off to stash it, but by the time he returns, the subordinate rats have eaten from the other piles in peace. Stashing itself is harmless — it is guarding a single source that starves the shy ones.
Fresh food: hand the shy rats theirs directly
Dry mix scatters well, but fresh vegetables served in a dish are easily monopolised. For the fresh portion, hand pieces directly to the lower-ranking rats first — most will take food from your fingers and retreat to a hammock to eat it — before putting the rest down for the group. If one rat consistently loses out, feed him his fresh portion in a carrier or on your lap during the group's meal, then return him straight away. Watch body language at feeding time for a week or two after changing the system: relaxed foraging spread across the cage is the picture you want, not one rat ricocheting between piles while others wait at the edges.
Weigh every rat, adjust by the trend
Distribution changes need evidence. Weigh each rat weekly — a bowl on kitchen scales with a treat in it works — and write the figures down. What you are looking for is the spread within the group: if the dominant rat gains while a shy rat falls over two or three weeks, distribution is still failing despite the scatter, so add more scatter points and more direct hand-feeding rather than cutting the total. If the whole group gains together, the total ration itself is too generous and can come down slightly. Individual illness can also sit behind one rat's weight loss, so a rat who keeps falling despite demonstrably getting his share deserves a vet check rather than ever more food.
One chart for the whole group
Weekly weights only reveal the pattern if they are recorded in one place by everyone who handles the rats. Keeping the weigh-in as a standing duty in KinsLe's Care Teams means each rat's figures land on the same shared list week after week, so the gap between the dominant rat and the shyest one shows up as a trend the household can act on — not as a surprise at the next health check.