The short answer: several short outings beat one long one
Exercise needs for a senior Dutch rabbit change from endurance to frequency. The long free-roam evenings of his youth become two or three shorter outings in a familiar space, each ending while he is still choosing to move, with hay, water, litter, and a hide always within a short, level walk. A senior Dutch does not need to be tired out; he needs his joints loosened, his gut kept moving, and his weight held steady, and gentle wandering with grazing stops achieves all three better than one exhausting session followed by a day of soreness.
What aging does to a Dutch rabbit's movement
The Dutch is a compact, active breed, which makes its senior slowdown easy to spot: the rabbit who once binkied across the room now thinks before hopping onto anything, and may stop mid-route to sit. Stiffness settles most often in the hips and lower back, so the first hop after a nap is frequently the hardest, and cold floors make it worse. Older Dutch rabbits also lose muscle along the hindquarters while gaining softness around the middle, a combination that reduces both power and confidence. Sore hocks are a particular watch point in a rabbit spending more time sitting, because weight rests on thin-skinned feet for longer stretches each day.
Designing a senior Dutch exercise session
Design a senior Dutch rabbit's session around a circuit he already knows. Open his pen into the same rabbit-proofed room, lay non-slip runners along his usual paths over any wood or tile, and scatter hay and a few leafy greens at intervals so the route itself feeds him as he goes. Place a cardboard hide or his carrier, door open, halfway along, so resting is built into the design rather than a sign of failure. Take ramps, boxes, and low furniture he used to hop onto out of the circuit entirely, because an old rabbit will still attempt a familiar jump on legs that no longer guarantee the landing. Gentle encouragement, a favourite herb offered a few feet ahead, works better than picking him up and relocating him.
Daily movement inside his living space
What a senior Dutch does between outings matters as much as the outings themselves. Keep his enclosure large enough for a genuine sequence of hops, arrange it on one level, and swap the litter tray for a low-entry one so using it never becomes a reason to hold on and move less. Rotate one chew toy or willow item daily so his home ground stays worth patrolling, and put his hay at the far end from his sleeping corner so every meal involves a short, purposeful walk. If he lives with a bonded partner, exercise them together, since a companion's movement reliably prompts his own, but watch that he gets his share of the scattered greens.
When a Dutch rabbit's slowdown needs a vet
Contact a rabbit-savvy vet if a senior Dutch stops eating or his droppings shrink sharply, if he drags or scuffs his back feet, stumbles, or develops red, bald, or broken skin on his hocks. Drooling, a wet chin, grinding teeth while hunched, or a rabbit who stops coming out of his hide entirely are also prompt-visit signs, as is any sudden change layered on gradual aging. A greying muzzle and a slower first hop are old age; a rabbit who stops moving to his food is a patient, not a pensioner.
Sharing his sessions across the family
Short, frequent outings only work if someone is reliably available at different times of day, which is exactly where a shared rota helps a senior Dutch. In KinsLe, Care Teams lets you assign his morning stretch, evening roam, and weekly weigh-in to different family members, and each person marks their task done with a timestamp so his exercise never depends on one person's memory.