Hi Jenna,
Pleased to hear all is going well with Heathcliffe. I wouldn't worry too much about Heathcliffe coping with rats, from the look of him, he'll be well able to take care of himself. And so long as you follow up the advice from all the great folks who are communicating with you, I'm sure he'll be fine. Just to give you a smile - many years ago I had a large black cat called Monty, and one evening there was such a racket going on in the garden, squeals and howls. When I went outside to see what was going on, there was Monty and a huge rat almost as big as himself, sitting up facing each other like a pair of boxers. Then with one leap Monty got the rat by the back of the neck, gave it one shake, which broke it's neck. Monty then came strutting back into the house, with not a mark on him. Any damage Heathcliffe comes home with, is much more likely to be from another tom cat, and of course all the good advice applies. By the way Heathcliffe's second photo is gorgeous.