Is it okay to leave my 1-month-old puppy alone for 10 hours?

If she is eating and drinking well on her own, then yes, she can survive being alone for that amount of time. If she is still nursing and not completely on to solid foods, then she would likely survive, but may not be getting enough nutrition, which can lead to problems if she has multiple days of being left alone for that long.

If you are just leaving her alone for this long for one day, then she should be fine. If you are planning to leave her alone for 10 hours each day, then you should also worry about behavior problems developing. Puppies left alone for that time without human contact or other stimulation will develop behavior problems where they are less social and may be more aggressive and overactive. It's best to make sure that she has some contact with people and gets some exercise every four hours to ensure that she doesn't develop behavior problems later on.

I hope that helps and all is well with Beetle.