The Saga of the Black Cat

Jet visits us daily. His owner moved away a couple of months ago, about a mile away, yet he still keeps coming. Now he has taken to arriving for his breakfast as well as for his evening meal.
 
Our cat, Taz, has had several fights with him now they seem to have a truce. The one stays out of the others way.
 
Back-story: this is the same cat that we put a paper collar on asking the owner to contact us. Instead she got her vet to ring us up!
 
He is a very beautiful and friendly cat but he is extremely strong with vicious teeth and claws.  And we have vets bills to prove it!