
It is normal for bitches to refuse to feed their pups at around 5 weeks of age, this is the weaning process, and they can seem quite mean for a few days, as they are causing the milk flow to subside by restricting the pups access. Usually if left to ther own devices after a few days Mum will again allow the pups to suckle occasionally, but only when she says so. This is the time that the Mother along with the siblings really teaches them about being a dog,a nd what the correct canine social conventions are. This is why pups should stay with their Mum to 7 or 8 weeks to gain these canine social skills.
This is the reason that pups used as Guide dogs and that help the disabled are put in puppy walker homes at 6 weeks, as they are fully weaned but not imprinted too much on other dogs. this is a spedcial case, and most dogs that are to be pets, especially if there are no other dogs in their home, need this grounding in being a dog. We see lots of pups that have been taken too young from their mothers at training class, where the owners are having inter dog aggression problems. It is very important that this pup gets to have lots of postive experiences with other dogs as he has been deprived of this interaction with his canine family.
This is often a problem faced with p-uppy farmed pups, as thy are often taiken ilegaly young from thei Mums so they can be sold while cute, or to fit in with when the dealker has room, is making his collections. Not only have these pups not had sufficient human contac t whilst tiny, but are deprived of the canine interaction as well, and unless the owners put a lot of work in this rarely gets made up and is one of the reasons for a maladjusted dog.
The dog is a complex social creature, expected to fit into a toatally alien world and o7ur hunan social structure. It is amazing how often they manage it despite their humans, lol :D