In project management the analogy of pig, chicken and roosters are used to drive home of the point regarding the commitment levels. To make hamburgers, the pig is committed(meaning they need to lose their life; In other words, Pigs skin is in the game). The chicken is involved(Meaning they can simply lay eggs and move on with their normal life). Roosters are considered unproductive and not-useful to be around.
Think pigs as your core team members; Chickens as your non-core members but useful and productive; Roosters as your team members who are GFN(Good for nothing). It’s important you have the right proportion of the pigs and chicken in your team so that you can deliver the hamburger(i.e. IT services).
So, now do you have the mental map of your team? Tell me how many pigs and chickens you see?. BTW, I believe you must have got rid of those roosters long back.