
Same as the above posters, my bitch always had access to her pups when they were being weaned. She loved being with them, and would fret if she was away from them for too long. She'd happily take herself off for a wander, and enjoyed her exercise, but she loved getting back to the pups up until they left at 8 weeks.
Mine were weaned onto a puppy food blended with lactol, put into a huge shallow dish and they all tucked in! It was madness and they all got covered in it. Fun though :-D They did have odd bits of other things.....minced beef, bit of cheese, scrambled egg, the little pigs. (I feel quite broody now!)
As long as Mum's happy, I don't see any reason to take her away from them :-)