Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to track the development of new puppies [title] Make sure that a newborn is functioning properly. [step] When a puppy is born you should assess its physical and behavioral status. This will allow you to know if it is on the right developmental track.

Ending1: [substeps] Look over the puppies to make sure they do not have any obvious birth defects. Check the mouth, anus and skull for abnormalities. Ending2: [substeps] Have it be looked at by a vet. Have its vital paperwork handled before it is born so that you have a full picture of the puppy's health. Ending3: [substeps] How do you assess your newborn puppy? Assess the puppy's state of physical development. Look for signs that it is sick, has a history of illness, or has been vaccinated against rabies, worms, tick bites, or parasites. Ending4: Puppies should : [substeps] Not be overly active during the first few months. Puppies that are not yet eight to ten weeks old should not be very active.

Answer format: ending1/ending2/ending3/ending4