What does Miller mean by: "A Proctor is always marked for calumny"?

In Proctor’s presence, a fool felt his foolishness instantly – and a Proctor is always marked for calumny therefore.” “Calumny” means a false statement intended to damage a person’s reputation – a literal definition of what happens to Proctor when he is accused of witchcraft.

" animal is healthy and eternally gratefully that you provided him with a warm home." and "the health and well-being of our animal friends is what is at stake here."