This will never work. With the advent of the Internet people love cats more than ever. A show about something that eats them will get zero ratings.
Unless they set it in Australia and Alf is our new Threatened Species Commissioner. He'd be a national hero. I'd fangirl. Just let him loose in the bush, it will be an all he can eat Cat buffet. Maybe he can call his friends down with all the strength he will have from eating all the feral cats, and then they can save the earth from the (very real) evil cat disease that has sadly infected so many 🙁