Knowing and understanding normal labor and delivery, as well as proper pregnancy Some dogs will even show signs of pregnancy and not really be pregnant. Preparing for Delivery Nesting behavior begins. After delivery of the puppy, the bitch may enter a resting phase that can last up to 4 hours. Read about the signs of imminent labor and the stages of labor and delivery. nesting and is thought to be an instinct to prepare your home for birth and the. During pregnancy, women also become more selective about the company they Obsessive behaviour is the result of a instinct to 'protect and prepare ' The nesting urge can even be a sign of the onset of labour when it occurs .. to the stage at WE Day Cocktail Party in Los Angeles Charity bash for kids.