I learnt from experience with Aby's that they don't take too kindly to their territory being *stomped* on by a big furry monster (or in my {ex's} cat's cace a pink furry furrball) - it took prattley (a tawny aby) a month to come to terms with sharing his house with Bastet.

That was war but I just let them get on with it... Now both are single cats again I am sure that both having the experience of being socialised that they (or at least I know Bastet would) love a companion. ...

If only *sigh* ...

Anyway - I wouldn't worry too much about Miley - she is queen of her castle and its about to be dethroned. I would leave claw marks too!