
4 - 4 1/2 weeks my pups are goi9gn stir crazy and need to go outside, where I have a 6 x 10 foot puppy run roofed in with one of those large plastic dog houses. A barrier across the open doorway allows Mum and other adults to go in and out of the pen, but pups can't get out so adults and Mum have some peace from the pups for a while yet. Pups are brou8ght into the indoor pen each evening and when I am cleaning the outside pen, and mum is able to access them.
At this age she pretty much does as Rabid has described feeding wise. I simply give the amount of food I think they will clear, and Mum gets to eat what is left, so no food is wasted. Mine only get a 1/4 pint of puppy milk per pup, so at most 1/2 pint per meal, but this age the dry food is only soaked not mashed, and with the increasing volume of the dog food (I don't increase the puppy milk at all, and by 5 weeks if pups motions are getting bit too soft cut it back even more, so by 6 weeks no more milk formula is given. As weaning progresses the ability of the puppies to digest milk decreases.
I simply increase the amount of food per meal based on puppies appetites, and as mien are fed to appetite the6y do often wander off mid meal and I pick the food up after half an hour. I do not subscribe to individual bowls, mien all share from a couple of flat pans, and with there never being a lack of food don't even have issues of food guarding etc.
Something I have found in warm weather is that the second and third meals are often eaten with little or no enthusiasm. My first meal is 8am and last at 10anm, and if they haven't been eating well in the warm part of the day I will leave down a bowl of dry food for them at night. Of course they have access to plenty of water to drink, I use the Large Road refresher Bowl, finding that way it stays unspilled an uncontaminated.
As for Mums interaction with pups, as others have noted at about 4 - 6 weeks it seems the kind of dash in and leave, but once weaning is pretty much complete from a volume basis from 6 weeks Mum, and the other adults start interacting with the pups more an from choice. At this age they are usually able to get out of my puppy outdoor run, unless I shut the gate during their meals.
They are then free to use the whole dogs area, and interact with my other dogs including Mum (though some choose to spend minimum time out with the baby sharks.
I do find at this stage they learn a lot, and that al dogs do not allow the same liberties, some will play some will turn a lip growl and snap if pushed to far.
I have found the litters that I have had since I have had more than just the mother of a litter seem to be much more dog savvy and confident/respectful than my first litter with just Mum, and believe those last two weeks interacting with the entire home pack really are very useful to them.