A little update - and a question of concern:
'Buster' is doing well, he is very affectionate and follows us around everywhere. He purrs and seems happy. HOWEVER, tonight Robin turned his massage pillow thing on, and it made a slight low volume buzzing sound. It freaked 'Buster' out big time. He couldn't work out what it was, so R turned it off and put it away. Since then he's been really jumpy and on edge. He even hissed at a toy he usually loves playing with. He won't let us touch him, ducks down and moves away. It is really upsetting. R put a movie on, and they are on the sofa now, but 'Buster' is still being weird.
Maybe it's a sound he recognises from the vets? Thing is, it was not even loud, like a hair dryer - and we've had both the dishwasher and washing machine on while he's been here. I really hope he is not becoming freaked out.
I know he's had a crazy few weeks, and although he seems settled here I guess he still associates certain things with things that has happened to him. I just hope he hasn't changed and that he will relax.
I will go and check on him now.