Dogster reports that some dogs become energetic at bedtime, bouncing around, digging into blankets, or demanding attention as the house settles down. The article says there is no single explanation and lists several possible reasons.
According to the report, a bed can be exciting because it smells like a favorite person and offers a chance for interaction. Being on the bed also puts a dog closer to its owner's face, which can prompt play bows, barking, or bouncing.
The article says the bed's familiar scent may make it an appealing place for a dog to explore. Dogs that like burrowing may also find a pile of sheets and blankets inviting. The report names Dachshunds and Chihuahuas as breeds that may be inclined toward this behavior, though it does not say this applies to every dog of those breeds.
The report says dogs learn which behaviors get a reaction. Playful behavior on the bed may earn attention, even negative attention, which can encourage the dog to repeat it. The article advises owners to make sure their methods for getting a dog off the bed match their message, and suggests a calm single command or a slip-lead instead of shouting.
Dogs with leftover energy may also be more active at bedtime. The article recommends an evening walk or a game of tug-of-war to help