We’d had a rough week. Maddy’s lungs weren’t cooperating, her blood pressure kept dipping, and the doctors were talking about options no parent ever wants to hear. But every Wednesday, no matter what, Duke came in. A big, goofy golden retriever in a therapy vest, with a smile so warm it melted the sterile chill of her hospital room. Maddy loved him. She’d barely speak to the nurses some days, but the second Duke walked in, she’d light up like nothing hurt. Today, though, was different. Duke didn’t come bounding…