When lots of employees leave your employ in close proximity to one another, it's time for some damage control. Here is a quick list of what you can do, and it does not include trying to save those that already left you:

One could argue that a truly healthy company requires a culture that includes kindness as a key ingredient. Corporate kindness matters a great deal. Corporate kindness is the act of employees being friendly, generous, and considerate to one another. It is actually one of the necessary elements for scalable success. 

Many human resources competencies are non-negotiable, because a lack of them could mean the difference between business success or failure. No smart business owner with employees will — nor should — discount the impact of human beings and their contribution, connection, communication and emotion when conducting business. This should be where human resources comes in.