Her whole life has been outdoors, and that shapes everything
A cat who has lived entirely as a barn cat has a skill set and a comfort zone built around open space: hunting rodents around feed stores, sleeping in straw, choosing her own company, and roaming a territory she knows by scent and season. Indoor noises that pet cats ignore, like televisions, washing machines, and doorbells, are genuinely foreign to her. Handling may be limited to brief contact with familiar farmhands, or none at all. Start from respect for that biography rather than a project to remake her, and your expectations for the first months will be far more realistic.
Decide what life you are actually offering
The happiest outcomes usually continue the life she understands, in a safer or better-supported version: a farm, smallholding, stables, or rural property where she can work outdoors with warm shelter, regular meals, and vet care when needed. A full conversion to indoor-only pet in a town flat asks the most of her and succeeds mainly with younger or unusually people-oriented barn cats, slowly and on her terms. Be honest about which offer yours is. If you want a cuddly house cat, this is almost certainly the wrong cat, however much you admire her toughness.
Ask about handling, companions, and hunting
Practical questions protect both of you. How does she react to being approached, stroked, or caught, and has she ever been in a carrier or seen a vet? Is she bonded to another barn cat who anchors her, in which case moving as a pair may be the difference between settling and vanishing? How strong is her hunting drive, and what wildlife or neighboring livestock might that affect at yours? Ask also how she is fed at the barn, since regular meals at a set place are what will anchor her to a new territory during the critical first weeks when she must be confined to a tack room, stable, or large pen to learn that this is now home.
Health unknowns come with the territory
Outdoor working cats often arrive with patchy records. Ask what is actually known: whether she is neutered, whether she has had any vaccinations or parasite prevention, and whether injuries or illnesses have been treated along the way. A vet check soon after arrival, arranged with the rescue's advice on how to transport a cat unused to handling, establishes a baseline for worms, fleas, teeth, and old injuries. Budget and plan for that uncertainty rather than assuming a barn cat's hardiness means she needs nothing.
Give her history a proper handover
What is known about a barn cat usually lives in people's memories: the farmer who fed her, the rescue volunteer who trapped and neutered her, the stable hand who knows she winters in the hay store. Ask for those details in writing before she moves, including feeding spots, shelter habits, companions, and any handling approach that works. KinsLe Transferrable Profiles keeps that gathered history together and passes it with her to you, so her routines, records, and known preferences are preserved for whoever cares for her next, instead of being lost between the barn she left and the home she is joining.