If Ron was a betting man, he'd have bet his stake in Weasleys' Wizard Wheezes that Hermione's reaction to their - extremely humane and entirely ethical - testing involving a litter of Kneazles would have been a lot of shouting about them being 'living things' and how he was being an arse.
Instead, she dropped her cloak and and brief case in a careless way one never associated with Hermione Granger-Weasley and immediately grabbed two of the little squirming fur balls at once. One seems entirely content to remain tucked into the crook of her arm in a way that has him wondering if they're about to adopt a Kneazle, while the other is fully prepared to scale her arm and pounce on that escaped tendril that bounces below her jaw. Not unlike Ron.
But, along side eternally infatuated Ron Weasley is business man Ron Weasley, and George was very adamant that any tampering with the little rascals could influence their results poorly.
So with as much distress as he can muster, Ron mumbles, "Can you please stop petting the test subjects?"
