During 2018 we adopted a cat in France, or rather it adopted us:
Normally we left cats to their own devices but it was clear this one had been abandoned too early. He'd been dependent on an elderly woman for food, but she was not well and during the summer he got thinner and thinner and started following us until our resistance crumbled.
By the time we sold our place he was in the UK where he has been ever since. During the last winter he spent most of his time indoors, and is not a hunting cat.
Recently another cat has appeared in our street that is much larger and aggressive; it attacked our cat as he was entering the cat flap and I had to shoo it away. He became very afraid of it, then last Thursday we went out shopping, having just fed him. We thought he'd be there when we returned after a couple of hours but he wasn't and we have not seen him since.
We've canvassed near neighbours and some have seen him but not recently. We also put fliers through letter-boxes and posters on lamp posts. A picture has been posted on a local facebook group and we've told the vet. His microchip details have been updated to 'lost'.
Any suggestions for further action welcome.