Just been in to give our late July five frame nucleus some more feed and a thorough check which we haven't done for a couple of weeks, though we added Apistan strips 4 days ago. Today our quiet non agressive bees had become pretty cross. Found the Queen, saw white capped honey and uncapped, capped brood and brood and some pollen but were not able to find any eggs, mainly due to volume of bees on the frames. They seemed so furious we didn't like to push them about too much. Some questions - would the Apistan made them cross? Is it normal for them to make a hole through one of the frames/foundation? I am uploading some photos, one of the Queen and another of the amount of bees on one of the frames. Would you say all looks normal? Any comments gratefully receivedAttachment 820Attachment 821Attachment 822