I have two cats now, Lady Catpool and Oreo. Lady Catpool has the quiet, introvert - like personality {have you heard about cats adopting their owners' personality? She adopted mine } but she's also very shrewd and calculating, making me peg her as a Slytherin. Especially when it comes to surveying other cats. She'd sit there observing their every move and acting accordingly to ensure they don't get too close. Not to mention, she'd always chose to save her own nec before anyone's or any other cats xD Aside from that, she's very loving and makes for excellent company

Oreo is more of my sister's, but that little furbaby is just so friendly and affectionate that I would place her in Hufflepuff. I have a video of her climbing on our fence, trying to befriend a huge bird that was perched there. I've watched her get friendly with a few strays, even bringing one of them up to our house for food