Why ramps defeat a young hedgehog
A standard multi-level cage is designed around an adult animal's confidence, and a tiny young hedgehog has none of the equipment for it. Hedgehogs see poorly at the best of times and judge depth badly; a youngster who has only just left the nest adds wobbly legs, a fraction of an adult's strength, and a body light enough that a tumble from a shelf edge can genuinely hurt him. Steep ramps ask for grip, balance and nerve all at once. The adaptation is therefore not to train him onto the ramp but to redesign the cage so the ramp is unnecessary until he is bigger.
One level, everything within reach
Start by relocating his whole life to the floor of the cage: hide and sleeping fleece in one corner, food and water in low, heavy dishes he cannot tip or climb into, litter area in its own spot, and his wheel standing on the floor rather than on a platform. A young hedgehog who can reach everything by walking will eat, drink, toilet and exercise properly; one who must climb to reach his water will quietly go without. Keep the layout stable once you set it — hedgehogs navigate by scent and habit, and rearranging his small world every few days is its own stress for an animal who can barely see it.
If you keep a ramp, rebuild it properly
If the cage layout forces one raised area, rebuild the access rather than removing the level: swap the steep ramp for a much longer, shallower one so the climb becomes a slope, fix solid side rails along both edges high enough that a small body cannot topple over them, and cover the surface with secured fleece or another grippy material his claws can hold. Test it the way he will meet it — in dim light, from his height — and block any gap where the ramp meets the shelf, because a youngster can wedge himself in spaces that look sealed to an adult eye. If any part of it still looks like a falling risk, take the level out of use until he grows; an unused shelf costs him nothing.
The wheel and the floor itself
Give him a solid-surface wheel — never a barred or mesh one, which trap small feet and toes — sized so his back stays flat as he runs, and standing directly on the cage floor. Check the floor too: any wire or grid base must be fully covered, because tiny feet slip through and panic a young hedgehog, and line the whole base with fleece or a smooth liner he can grip. Lower the water bottle spout if you use one, or switch to a shallow dish, and scan the cage at his eye level for hidey-hole hazards — gaps behind liners, loose fleece threads that can wind around a small leg.
Growing into the full cage
Adaptation is temporary, and the stages back are simple: as he gains size and confidence over the coming weeks, reintroduce the shallow ramp first, watch whether he uses it steadily rather than sliding, then raise complexity a step at a time. A youngster who hesitates, avoids a section or stops reaching his food is telling you the step came too soon. Keeping a simple weekly record of his weight, appetite and activity as KinsLe Care Teams duties gives everyone in the family the same picture of his progress — so the decision to open up the full cage rests on how he is actually doing, not on how old the calendar says he is.