I had moved my two beehives to a new location on another farm 4 weeks ago. They had quite a bit of fed sugar and honey in the hive. Today I checked them and was going to feed them some more. The stronger hive was fine, but as I opened up the weaker one I found what appeared to be a nest of small black ants around and under the sugar source(a frame feeder). How can I get rid of them? I am worried about the bees as they were already weak and their activity has dropped right off and numbers are decreasing. HELP!!