Hey Kinderchicklets,
While I know lots of things about peregrines, sick or injured peregrines require a special doctor, an animal doctor (called a veterinarian or vet). So if one of our chicks got sick I would take them to a vet for them to take care of them. The biggest problem is that it is very difficult to tell if an adult or baby peregrine is sick, they can't talk and because they are wild, they don't like to let anyone know they are hurt or feeling sick. That is one of the primary reasons for having a camera on the nestboxes, it lets us watch the peregrines daily so that if there is some little change, we can maybe notice it!
Good question 'chicklets!
The Peregrine Chick