It's great! Ferdinand was neutered last week. I thought it would take a while for him to calm down and for the testosterone to clear his system, but I was wrong. I'm sure it's too soon to tell the real results, but boy he's turned into quite the quiet little lapdog. And he hasn't marked since I got him home. He's still very playful, but calm too (if that makes any sense). Whereas before the surgery he was a little wild-child. He's my little angel dog now!