How long can I safely leave my dog and newborn puppies alone?

If the pups are kept warm, there is no problem with her staying away from the puppies for 1/2 hour. If she does not get stressed out by being away from them, you can take her for a walk around the block up to 1/2 hour and later on even longer. It is important that the puppies do not get cold. It is best to take her out after the puppies suckled, and now are sleeping. Make sure they are in a box, so they cannot start crawling around when mom is gone.

Monitoring throughout the 8 week period until the puppies are weaned is recommended, yes, although it may be difficult while you are sleeping. Having the mom and pups in your room and setting an alarm to check on them a few times a night is reasonable. If you are able to get someone to watch them that's great. Otherwise minimize the amount of time they are left alone as much as possible, and try to get a dog sitter if you will be gone more than an hour. Breeding dogs is a lot of work, and it is important to keep track of the mom and pups' progress by checking on them frequently. Here is some more information on birthing puppies https://www.vin.com/veterinarypartner/default.aspx?pid=19239&id=4951546

Unless your dog has a history of hurting her pups or you noticed that she is trying to hurt them, there should be no reason that you cannot leave her alone with her puppies. She is a mother, and mothers usually take good care of their babies.

If he is over 7 days old, you could leave him for no more than a 6 hour period of time. He should be eating every 4 hours, but one stretch of 6 hours in a 24 hour period would be acceptable. Here is a great article with some guidelines for you: https://www.petcoach.co/article/orphaned-puppies-how-to-raise-them/ Good luck with him! Thanks for asking PetCoach!

Taking them outside would not be recommended. At their age, their immune systems are not strong enough to resist potential infection. They should remain indoors for now. If they are able to wander away from mom, watch them to prevent mischief or injury. They will return when they are hungry. They will likely need to nurse every 6-8 hours.

I would not leave the puppy with her unattended. You will need to let the puppy suckle every two hours under supervision. If she eats her puppies, it may be a good idea not to breed her again, as "bad" mother instincts can be hereditary.

Yes you can, absolutely no problem just as long as it is not on a daily basis, at this age it is not recommended to leave her by herself for too long on a permanent basis due to potential future behavioral issues.