So I added my first supers to two of my 3 hives about 2 weeks ago. With all the rain we've had around here (southeast qld) in the last 2 or 3 weeks I didn't expect much activity in the hive.
The 2 hives that I added the supers to are almost the same except 1 has a queen excluder and the other doesn't. After doing a little I decided to go for foundation less frames in my supers.
I had a quick peek in the hives last week and all seemed well. So I thought I would open up the hives today and have a good look. The first hive the 1 with the excluder was looking good the have started to build comb. Then when I looked in the second hive ( without excluder) I saw cross comb ( please see pic below) I have remove the cross comb. My question is what's the best way to prevent cross comb when using foundationless frames. Also should I add an excluder the the second hive? Thanks in advance