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Fifteen to twenty grams of lab block, ten to fifteen grams of fresh vegetables, and treats capped at ten percent — the daily ration in grams.
The daily ration has three parts, and all three are measured in grams. The staple is lab block at 15-20 g per adult rat per day; fresh vegetables add 10-15 g; sugary or fatty treats are capped at 10% of the day's total intake.
Where a rat sits in the 15-20 g range tracks body size. Adult bucks run 300-500 g and take the top of the range; adult does run 250-350 g and take the lower end. Pups are weaned onto solid food at 21 days, and the adult figures apply once a rat reaches adult weight.
On narrow screens, swipe or scroll the plate sideways.
Weigh the ration for the first few weeks rather than guessing by the scoop. A measured bowl turns appetite into data: in an animal with a 2-3 year lifespan, a rat that stops finishing its block is information worth having the same day, not at the weekend.
The kitchen is not a treat jar. Keeper references consistently list a short set of foods as unsafe for rats: chocolate, caffeinated drinks, alcohol, raw dry beans, green potato skin and eyes, apple seeds, and any mouldy or spoiled food. Fresh vegetables inside the 10-15 g allowance are the safe route to variety.
Feeding sits inside the whole keeping plan: the ration assumes a cage that passes the Rat Cage Size and Bar Spacing Guide and runs on the cleaning clock from How to Set Up a Rat Cage, Step by Step.
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