> So, is it possible to "over-feed" the hive?
Yes. A package will often swarm when they backfill the brood nest from constant feeding.
> Does it cause problems when I accidently allow the feeder to run dry for a day or two?
No. I would remove it completely.
>And, finally, how long should we continue to feed?
I would stop about a month ago...
http://www.bushfarms.com/beesfeeding.htm
Yes. A package will often swarm when they backfill the brood nest from constant feeding.
> Does it cause problems when I accidently allow the feeder to run dry for a day or two?
No. I would remove it completely.
>And, finally, how long should we continue to feed?
I would stop about a month ago...
http://www.bushfarms.com/beesfeeding.htm