For a senior cat, the carrier often carries years of association: it appears only when something unpleasant follows, it smells of storage rather than of home, and getting into it involves being cornered by people she loves. You cannot argue her out of that history, but you can overwrite it slowly, by making the carrier an ordinary piece of her home life and by removing the chase from trip day entirely. Older cats learn this new routine well when every step stays small and nothing is rushed.
Leave the Carrier Out as Furniture, With Her Bedding Inside
Place the carrier in a quiet corner she already likes, with the door fixed open or removed, and line it with her own bedding so it smells of her rather than of a garage or a cupboard. A top-opening or front-and-top carrier suits a senior cat, because she can be lifted gently rather than pulled out, but whichever carrier you own, its permanent presence is what changes its meaning. Let her discover it empty and unhurried. If she naps inside it within the first weeks, the battle is half won, because a cat who sleeps somewhere has claimed it as safe. Wash or replace the bedding only when she is elsewhere, and return the carrier to its exact spot, since a retreat that moves rooms keeps its old warning value.
Rebuild the Association in Small, Repeatable Steps
Work through a gentle sequence across many days, ending each session while she is still relaxed. Begin with treats or a small meal served near the carrier, then just inside its doorway, then deeper inside with the door still open. Next, close the door for a few seconds while she eats, open it before she finishes, and build that closed time slowly. Later steps can include fastening the door, lifting the carrier a few inches, setting it down again, and eventually carrying it to the door and back, each stage repeated until it bores her. If she freezes, vocalises or tries to leave, you have moved too fast; return to the previous stage for several sessions. Senior joints and senior confidence both deserve the slower route, and a step skipped in haste usually has to be rebuilt anyway.
Trip Day Without a Chase, and a Calmer Return
On the day, keep the morning ordinary, shut the doors along her escape routes, and let her walk into the carrier's room for a treat rather than pursuing her through the house, because a chase teaches her that trip day begins with being hunted. Let her walk in for food or a treat, close the door calmly, and cover the carrier with a light blanket for the car so the journey passes in dim, enclosed quiet. Drive smoothly, with the carrier strapped so it cannot slide, and at the practice carry it in with both hands underneath so it stays level, set it on a chair or a raised surface rather than the floor among feet and dog noses, and keep the cover in place until she is in the consulting room; ask for minimal waiting-room time among dogs, since you mentioned her age and her nerves when booking, and ask the team to return her to the carrier between parts of the examination if she settles better there, and to note on her file which handling approaches she accepted, so the next visit starts from knowledge rather than from scratch. Back home, open the carrier in her quiet room and let her emerge in her own time, then put the carrier back in its corner rather than hiding it away. Her handling preferences and what calmed her can be noted in KinsLe, where Pet Passport holds that guidance alongside her health records for the next visit.