He doesn't care if his Counterpart cares. Especially because he's convinced that his Counterpart is an idiot and that he doesn't know better than Shirogane what's good for him.

"It's a kitten. How much damage could something like it do? They're not going to grow up to be those Loewes that you're talking about."

He gives the kitten a poke, and it just mews before licking his finger. Point made.

"Besides...kittens don't hatch." And they are not adorable. Fluffy, yes.