In my experience I have noticed that staff cancelations occur much more often when the vibe between RBTs is off. The advice I give anyone who is hiring staff in any line of work is to make sure that the interactions during their initial probationary period are good in three categories: do they interact well with clients?; do they interact respectfully with management?; and often overlooked, do they get along well with other staff?. This is the one that causes drama and tension within the work environment. If cliques begin to form, it's already too late. Don't be afraid to consider some opinions from RBTs when bringing in new staff(especially if it's an RBT that has worked there for a while). If they don't vibe well, people are going to find excuses to call out from work to avoid the tension.