How much should a Cavalier King Charles Spaniel eat?

Across the full adult weight range (5–8 kg), a Cavalier King Charles Spaniel needs about 374–533 kcal/day — 91–130 g of typical kibble (370 kcal/100 g) after the 10% treat allowance is removed — depending on weight, sex and activity. A typical adult at the middle of the range (6.5 kg) needs about 456 kcal/day, roughly 111 g, split over 2 meals.

Two small, measured meals a day suits a Cavalier King Charles Spaniel: about 55 g per meal from a daily total of 111 g (456 kcal) for a 6.5 kg adult. A cavalier that begs after a full meal is not hungry — it is a cavalier — and with a heart condition in the background, the treat budget is the whole battle. Keep the two meals at the same times and let nobody in the house add a third.

About 111 g/day is roughly 1.1 cups at the typical density of 100 g per cup — but cups vary by up to 40% between kibbles, so weigh the grams once and the question disappears. A cup is a volume; grams are the portion. At this size the margin is tiny — a heaped cup instead of a level one can add a fifth of the whole day, which is why a gram scale pays off most for small dogs.

Over 7 days: 25% new food for 2 days, 50% for 2 days, 75% for 2 days, then 100% — keeping the total daily grams at the number on this page throughout. Small dogs should not skip meals during a switch: if your Cavalier King Charles Spaniel refuses the new mix for more than a day, slow down and check with your vet rather than letting them go hungry. If stools loosen, hold at the current mix for an extra day or two.

Small-breed puppies reach adult factors at about 10–12 months. Use ×3.0 under 4 months, tapering to ×2.0 by 8 months, on current weight, recalculated every two weeks — growth is quick at this size and the answer changes monthly.

At the size-correct BARF rate of 3.0% of ideal body weight, a 6.5 kg Cavalier King Charles Spaniel eats about 195 g of raw food per day — split 70% muscle meat, 10% raw edible bone, 5% liver, 5% other organ, 10% vegetables and fruit on the BARF model.

From about 10–12 months a Cavalier King Charles Spaniel counts as fully adult; the senior shift usually arrives years later, when activity and muscle mass fall. The calculator's senior factor (×1.4 instead of ×1.6) trims a 6.5 kg Cavalier King Charles Spaniel from 456 to about 399 kcal/day — roughly 97 g of typical kibble. Make the change gradually and judge by body condition, not birthdays alone: a still-active older Cavalier King Charles Spaniel may hold condition on the adult number.

Yes, in one way that matters: keep the dog lean. Cavaliers are prone to mitral valve disease, and extra weight makes a struggling heart work harder. The portion itself is the standard one — about 456 kcal/day for a 6.5 kg adult — but the treat budget matters more here than for most breeds, because every extra kilo is carried by a heart that may already be working hard. If your vet has prescribed a cardiac diet, that overrides this page.

Cavaliers are famously picky, and the usual response — topping up with tastier extras — trains the fussiness and breaks the daily number at the same time. Offer the measured 111 g/day, take it away after 15 minutes if untouched, and try again at the next meal: a healthy Cavalier will not starve itself. If fussiness is new or comes with weight loss, that is a vet visit, not a food change.