At my first check I had lost 3 out of 18. One couldn't move over to stores and starved. The other 2 had dead bees on the bottom board-I don't know why. Since then, I had one to lose a queen and I combined what was left of it. Most of my hives are doing very well-one even has a honey super 1/2 full. I have 2 hives that are just now getting going. But I have 4 that are just standing still with the same amount of bees as a month ago. I don't know what might be wrong, but I will combine them hoping that that will give enough nurse bees and workforce to get them going.
Also, I got my first swarm today.