How do the boys react to their visitor?
They know Wonky, they met him when they were kittens. When I could hold both of them at the same time, we sat outside and they all had a good sniff of each other. This was when Zoonie was having toileting problems because of Wonky, it was he who sat on the doorstep and left his mark.
Now they just sit and look at each other through the window, no growling or shenanigans. When Wonky moves, Astro and Zoonie will run to another window to stare at him.
I call him Mr Wonky because his head tilts to the left, the product of an ear infection when he was a kitten.