Many owners think it’s completely normal for a small dog to sleep most of the day. And to some extent, they’re right. Small dogs do love their naps. But there’s a big difference between a dog that enjoys resting and a dog that simply doesn’t have the energy to enjoy life. I’ve spent years observing small dogs. Bolognese. Maltese. Bichons. Poodles. Yorkshire Terriers. And I often hear the same sentence: “He’s probably just getting older.” Even when the dog is only four or five years old. Or: “That’s just his personality.” But sometimes the problem has nothing to do with personality. Sometimes the problem is sitting right there in the…