
Hi again,
Socialising pups isn't only about handling - although that is very important - but she may be concerned about things in the environment, textures of different floor coverings, sights, smells, sounds and even vibrations of ordinary domestic equipment ;) Is she alright with the vacuum cleaner, washing machine, dishwasher, radio, the toilet flushing, bath running, telephone (call yourself from your mobile during the day if it doesn't ring often ;) ) different channels of the TV such as music, chat shows, thrillers, western movies (LOL - you'll be amazed at the different reactions if you've not done that yet!)
Indoors, I would concentrate on splitting her socialisation into two quite separate categories, (1) where she is individually habituated to things and (2) with one of the bolder pups in the litter. Sometimes nervousness means the quieter puppy can become overwhelmed by it's more confident siblings and other times it can be over dependent on them. Try and establish which way (if any) she is more relaxed and confident. If there is an obvious difference, you will know more easily how to progress.
Make sure you get them out and about too - in the garden is obvious and great for getting used to bird song, wind, people talking in other gardens, hedge cutters, lawn mowers & strimmers etc that neighbours might be using.
There are lots of things you can do and introduce her to both individually and with a bit of moral support such as her dam or a littermate - but don't let her become completely needy of other canine company. If you notice this is how she handles things best that's a start, but one that you have to be cautious of too.
If all of this has already been covered by you then let me know and I'll go onto the great outdoors - i.e. outside of the home & garden. But don't want to either bore you or overwhelm you totally.
They are SUCH hard work - but so worth it! Regards, Teri ;)