The grip is the problem to design around
An older bird with stiff feet is not being stubborn when it avoids a perch; the toes simply cannot curl and hold the way they once did. Stiff, arthritic feet grip weakly, tire quickly, and ache on hard, uniform surfaces, so the cage has to do more of the work. The goal of every change below is the same: let this bird rest, eat, and sleep without depending on a strong clench. Start by watching where the bird chooses to sit now, because that favourite spot reveals the diameter and height its feet currently tolerate best.
Wider, varied perches instead of thin dowels
Perch diameter is the single biggest lever for an older bird with stiff feet. A perch that is too thin forces the toes into a tight curl and concentrates pressure on one band of the sole, while a wider perch lets the foot spread and share the load. Replace the standard smooth dowel set with natural branches of several widths, including one noticeably chunky option, and avoid abrasive coverings that can tear skin already thinned by age. Position the widest perch where the bird sleeps, since night is the longest single stretch of gripping. If the bird consistently abandons a perch within a day of it being fitted, believe the feet and try a different width rather than coaxing it back.
A flat platform gives stiff toes a real rest
A flat platform perch changes the equation entirely for an older bird with stiff feet, because standing flat asks nothing of the toes at all. Fit one solid platform at a modest height, cover it with a washable, non-loop fabric or plain paper changed often, and place it near food so the bird can eat while standing flat. Many stiff-footed birds begin sleeping on the platform once they trust it, which removes hours of night gripping. Keep an eye on droppings building up on the flat surface, since a platform collects mess a round perch would shed, and wipe it down as part of the morning routine.
Lower everything and soften the landing
Height becomes a hazard once an older bird's grip can fail without warning. Bring the whole cage layout down: food, water, platform, and the sleeping perch in the lower half, with short hops between them instead of flights. Line the cage floor with a soft layer of paper or a low-pile mat beneath the sleeping area so a slip ends in a cushioned thud rather than a hard impact, and remove tall toys or swings that invite climbing the bird's feet can no longer finish safely. Keep one gentle route up to a slightly higher lookout if the bird still enjoys it, but nothing essential should live at the top of the cage anymore.
Watch the soles, not just the perches
Perch changes only help an older bird with stiff feet if someone is checking the feet themselves. Look at the soles during calm handling for redness, shiny worn patches, swelling, or a sore the bird has been favouring, and notice whether it shifts weight from foot to foot or refuses to step up. A bird that stops perching altogether, holds a foot up constantly, or goes quiet and eats less needs an avian vet visit, not another perch experiment, because foot pain and infection can progress quickly in a bird that hides illness. Recording who checked and what they saw in KinsLe's Care Teams keeps those daily foot checks shared and timestamped, so a slow change in this bird's grip is spotted by the household, not missed between helpers.