[ What are people doing with Kido's cats... ]

Maybe he got pecked as a kid, like how some people are scared of dogs.

[ He's a kid, so Kido is more forgiving for him to be scared of whatever he wants. ]

But that's interesting... The owners have some connection to this castle, and are also familiar with the dungeons? Or, at least, they don't think it's weird being handed things like feathers and slime.