My cat is a very old man. He's 13 and is normally very active and happy. Recently however, he has not been nearly as active as a few days ago, sitting on my kitchen table for about three days now, without getting up. He eats and drinks less every day, and has not used the litterbox at all in that time. Sadly a trip to the vet is out of the question, as my cat despises the vet and the member of my household who pays the vet bills refuses to take him. Does anyone know anything I could do to try and help him?