Hay first, at Flemish Giant scale
A Flemish Giant rabbit should eat unlimited grass hay as its main everyday diet, with the pile refreshed at least twice daily because this breed eats through a normal rabbit's hay rack in hours. Timothy or other grass hay should always be available in a rack plus a loose pile on the floor, since a Flemish Giant grazes for long stretches and its large gut needs fibre moving through it constantly. Hay also wears the teeth of a Flemish Giant, whose jaw works through far more volume than a small breed's.
Why pellets stay modest for a giant
Pellets stay a measured extra for a Flemish Giant, not the centre of the diet, even though the portion looks larger than a dwarf breed's. A plain, high-fibre pellet given in a small handful once a day supplies concentrated nutrition without displacing hay, and scattering it in the hay pile slows a big rabbit down. Flemish Giants mature slowly and keep growing well past the age a small breed finishes, so a young giant follows the grower's guidance for its stage, while a settled adult that is gaining should have pellets trimmed before hay is ever touched.
Greens and variety for a Flemish Giant
Greens give a Flemish Giant its daily variety: two generous handfuls of leafy greens such as romaine, kale, spring greens, and herb tops like parsley and coriander, introduced one at a time over several days. Wash everything, rotate three or four greens across the week, and feed them at room temperature rather than straight from the coldest shelf. Carrot and fruit belong in the treat category for a Flemish Giant despite the cartoon image — a small slice occasionally, never a daily carrot pile, because the sugars add up fast across a big appetite.
Water and feeding setup for a very large rabbit
A Flemish Giant drinks far more than a small rabbit, so provide a large heavy crock as well as a bottle, scrubbed and refilled daily, and check that a bottle alone is actually keeping up. Feed hay off the floor of a roomy pen or room corner rather than a small hutch rack, and keep pellets in a spill-proof bowl a giant head cannot tip. Because a Flemish Giant's weight can damage feet on wire floors, its feeding station belongs on a solid, clean surface where spilled greens are cleared before they are trampled and soiled.
Weight watch for a slow-maturing giant
Weight creeps on quietly in a Flemish Giant, hidden by sheer size and a thick coat, so feel for ribs under a light covering of flesh each week and watch for a growing dewlap. Cut pellets and treats first if condition rises, and increase space and hay-based foraging rather than reducing hay. Droppings should stay large, round, and plentiful; a Flemish Giant producing far fewer, or eating noticeably less hay, is telling you something has changed. Soft, uneaten caecal pellets stuck around the rear often point to a diet too rich in pellets and greens for the hay being eaten.
When a Flemish Giant's appetite is an emergency
A Flemish Giant that stops eating, produces no droppings, or sits hunched and grinding its teeth needs a veterinarian the same day, because gut slowdown in rabbits becomes serious quickly and size does not protect against it. Bring notes on the last hay, greens, and pellets actually eaten, not just offered. For a rabbit this size, several helpers often share the work, and KinsLe Care Teams keeps hay refills, green feeds, and pellet duties for the Flemish Giant assigned to named people and timestamped when done, so a missed feed is visible before it becomes a problem.