...of any one else that comes into the house.

Its been just me and them since I got them at 8 weeks in november, three little bundles of kitten-ness. Since then they have been getting more and more nervous of other people when they come in to my house to the point where they all run down the stairs and across the living room floor flat as pancakes and then out and I won't see them until the next day.

Does anyone else have this problem and is there anything I can do to help them? It started off with just one of them but now they just seem to copy each other...

Any advice would be great
Thanks

Louise