You can pull all three out and move around the rockwork and re-introduce them.
Or just leave everything alone and see how severe it really is. Are they hosting? If so, move thier host to a corner to create max real estate for everyone else.
If not hosting, get them a host. They will be almost drunken with delight playing in the new host and forget about the rest of the world.
Either way sooner or later the odds are they will bully the hawk and create boundries. Nothing new there, Clowns are fearsome attackers if you invade what they have claimed. Everything will take time for territory to be established but then no worries.
Just keep an eye on them for now. if scales actuall start to fly, then perhaps someone has to be moved out.