After 2 weeks the hens are still not friends

Hubby had to stand guard so the new hens could eat yesterday  At night they all go into the roosting bit, but the new hens huddle together on top of the nesting boxes. I´ve tried putting them onto the roosting ´poles´ they appear to stay there, but the next night they are back to huddling together.  When we got new hens before it was only a couple of days until they were all friends.  The older hens are about a year (2) and the other 3 are about 9 months old, maybe a bit less.  The new ones (5)  are point of lay.  Colin has been making friends with them at last, he was sitting amongst them yesterday under the geranium plant (that they are gradually demolishing- it was about 3 foot tall!) But make friends with the older ones??  It seems to be the older ones that make the trouble.  
Hens! :?
Pamela

If you can, put some mesh down middle of run, or make a temp run next to other hens.  They will hopefully get used to each other without being able to damage each other.  Keep them like this iuntil you feel the problem has been resolved.  I've done this a number of times in the past when run area was limited.  I now have a very large freerange area where there is plenty of room to escape so don;t need to any more.

Have you got more than one feeding and drinking point for them?  I find even 2 is not enough for lower pecking order birds sometimes and put lots of smaller feeders/drinkers dotted around run area.

good luck!