The next personality in the sheepfold are wolves. In Acts 20:28-30, Apostle Paul spoke about wolves.
28 Therefore take heed to yourselves and to all the flock, among which the Holy Spirit has made you overseers, to shepherd the church of God which He purchased with His own blood.
29 For I know this, that after my departure savage wolves will come in among you, not sparing the flock.
30 Also from among yourselves men will rise up, speaking perverse things, to draw away the disciples after themselves.
Wolves are human beings with the nature of a snake in them. They are not victims of the devil but agents of satanic entry into the sheepfold. Wolves are absolutely impossible to shepherd because they don't come to the church to be served, but rather to do evil.
Wolves are in church to scam believers. They believe Christians are simple people who are generous and can be easily deceived. It is in the ministry of the shepherd to protect the sheep from wolves. Church members should cultivate such a life that everyone in their workplace, home and business would know that they respect their pastor enough to obey him. This is what brings safety to you. This is because there are members that have the tendency of being goats. Such ones believe that their pastor has no business knowing anything about what is going on in their lives. Members have to be careful. It is not everybody that shows up in church that has pure intentions. Just because a person attends your church does not mean you know them.
Wolves are different from goats because they can harm the sheep. Goats are just stubborn people that move around and scatter the pasture. A goat can stand up at any point in the service no matter the ministration going on and decide to go home. Wolves on the other hand have the agenda of hurting the sheep.