>>I bought from Hawiaii.  Carniolans to be exact.

Carniolans tend to be gentle but Carniolan hybrids may not be.

>>They start to defend the hive 10 meters away.

Assuming the extra defensiveness is not in the genes, this is often 
an indication of an earlier disturbance.  At this time, yellow 
jackets will often harrass hives and take bees, causing the hives to 
be on guard.

If you don't have a decent flow on, lots of foragers will be idle at 
the hive ready for a fight.

Someone could have sprayed some chemicals in the area aggravating the 
bees... 

>>When I walked back in the field this afternoon to check them I was 
met with a few bees over 30 meters from the hive.

You did not have a banana or two just before going out there? ;-)  I 
went to check a hive after snacking on a banana and could not figure 
out why several bees kept flying at my mouth and nose...  Afterwards, 
I realized it must have been my banana breath.  Bees associate banana 
odor with their alarm odor!

Before requeening, I'd flip flop this hive with your weakest one in 
the early evening.  You'll rid of most of the older foragers and make 
more manageable.

My 2 cents,

Waldemar

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