Many viewers of the 24/7 puppy camera have raised questions, such as what are the pipes running alongside the whelping box. These are called "pig rails" and they are designed to protect the puppies from their mother accidentally lying on them, ensuring the puppies' safety. Since the puppies are unable to regulate their own body temperature, we use a heat lamp over the whelping box to keep them warm when Tulip is outside the box. However, we turn the heat lamp off when she is nursing the puppies. By 3 to 4 weeks of age, the puppies can regulate their temperature, which should then be in the normal range of 100.5°F to 102.5°F (38°C to 39.3°C). The most significant event this week is that the puppies' eyes have opened. Mr. Devil's eyes (the one with the red collar) were the first to open. Each puppy followed and within 48 hours they had all opened. The puppies are now weighing almost 3 lbs, and Tulip provides them nourishment at least every 2 hours, often throughou...