I agree, you have to feel sorry for Rex. He's already been demoted from having his own bedroom and dino ensuite* to getting Rose's old room (which I doubt has even been redecorated for him - as you know Stacey would have shown it if it had), and it can only be a matter of time before he's in the annex too.
*we've not seen the dino ensuite since Stacey redid the bedroom for the golden girls, I wonder if all the cut in half dinosaurs have been removed now to be replaced by something more in keeping? Although tbh given how little anyone washes in that house, she's probably using that room for storage!