The problem is it is not my pet which is why I am so torn about what to do . The people next door have been my neighbours for 30 years , we don`t have a very close relationship but are pleasant and make small talk on occasion . They have a dog who they adore and a cat of about 12 who spends most of his time in my house , I have a cat flap for my cats and as many times as I put him out he just comes back. For the last couple of years he has been unwell , lost loads of weight and looks pretty miserable . I have spoken to them a few times about him and I know they did take him to the vet once , they took his teeth out and charged them £500 so they were not best pleased as it didn`t make any difference to his condition . The last few months he just looks dreadful , makes a funny noise when eating and coughs a lot . Obviously it is not contagious to my cats as they would have caught it by now . I just don`t know what to do , would they see him at the vet as he is not my cat? , should I say he is a stray? I know it is pointless speaking to the neighbours yet again as they obviously don`t care about the poor thing but he is plainly suffering . I don`t want to fall out with them as it will be very uncomfortable to live next door but feel I need to do something . Any suggestions which are not to speak to them again about the cat as it is pointless .