Babies cry at night. So do puppies. Puppies are also into creative yowling. Baby shampoo does cost less than puppy shampoo. And flea spray.
Baby food costs less than puppy food.
Babies love to be rocked and cuddled. Puppies expect no less. Babies outgrow your lap in five years. Puppies outgrow it in five months. Babies go for a walk in a stroller.