A puppy should be separated from its mother at 6 to 8 weeks. A puppy at 4 weeks (1 month) is far too young to be taken from it's mother.1 person found this useful. Edit.ormal age for a puppy to be weaned from its mother is 6-8 weeks. But it has been proven that the longer you can keep your puppy with it's mother the better. 10 people found this useful. Edit. Share to: Karin L. 270,023 Contributions. Cattle reproduction is more than just putting the bull out with a bunch of cows.