In one of my hive I have problem as following:
New queen long time don't start laying (above 1 month). When I gave to this
hive 1 comb of young brood from another hive, she started. It was to
understand last year because workers must work very hard to build a combs
but the same sytuation I had this year despite all was OK. I think it is
something bad in the hive. Can it be?
 
Andrzej, Poland