Patented recipe for creating a Flop Dog.
Take one small dog.
Drive to breeder's house and drop off dog for the day, to be summarily popped into a yard with two other dogs who are both friendly and playful.
Add one bitch in season.
Add one other dog, in an adjacent yard, who has sired puppies by said bitch, and who thinks your dog should die, now, for being within a mile of said bitch in season.
Leave to percolate for one entire day.
Pick up said dog about 8:00 p.m.
Guaranteed flop dog. All attempts to awaken from his coma-like sleep are useless. Leave until morning, when he will once again morph into a Miniature Pinscher.