How much should I feed a giant breed dog?

Giant breeds need the least food per kilogram of body weight of any size category, so it is especially important to calculate from actual weight rather than assuming a very large dog simply eats proportionally more of everything.

A 60kg dog and an 80kg dog of the same breed can have daily needs that differ by less, proportionally, than the weight difference alone would suggest.

Two or three smaller meals a day is standard practice for giant breeds, both for digestive comfort and because a single very large meal can genuinely be uncomfortable for a dog this size.

Keep meal times reasonably consistent day to day, since a steady routine tends to suit large, deep chested dogs well.

Expect to buy food in larger quantities and store it in a sealed, airtight container to keep it fresh over the weeks it takes to use a big bag.

Weigh your dog every four to six weeks, often at your vet clinic if a home scale is not practical, and involve your vet in confirming the calculated amount for your specific dog. Individual variation at this extreme size can be larger than a general formula fully captures, so a vet who knows your dog is worth involving early rather than only once a problem has already appeared, since fine tuning is easier before a trend becomes established.