Black female cat

Unfortunately it's with sad regret we need to re-home our nearly 1 year old girl cat. She is finding it hard to settle into our home with the 2 older cats despite all efforts. She will need to be microchipped asap and neutered. We've not been able to do this due to her weight. She does eat biscuits and meat but the stress is making her loss alot of weight. Vets have recommended she goes to a home as an only pet with someone who is patient with her to build her confidence