Thanks,

We had him checked over at the vets a couple of weeks ago and he is sound. The howling stared about three weeks after having him. He was next door to a cat at the cats home and when he came here there would have been cat smells everywhere from our old cat so could it be a companion problem?

Sorry i seem like a complete novice on cats but i am only 14 so i dont really know whats wrong with him!