I received and answered a similar question with the same photographs on 4/23, so I am assuming you are the same person who submitted that question.  Apparently, my answer was not returned to you. I copied the answer I sent out on 4/23 below.  If this does not answer your question, please respond to this answer to let me know if you need additional information. 

Thank you for your question. Your friend is correct. The snake in your photos is a Florida pine snake, scientific name (Pituophis melanoleucus mugitus). This species is non-venomous. Unlike the northern pine snake, the Florida subspecies has markings that are much lighter in color and have less contrast with the light background color of the snake.

There are three subspecies of pine snake: the northern pine snake (Pituophis melanoleucus melanoleucus), the black pine snake (P. m. lodingi) and the Florida pine snake. Pine snakes are found in 13 eastern states, but they tend to have patchy distribution within the states. South Carolina and Florida have the largest continuous distribution of any of the states. This snake is typically found in habitat with well-drained, sandy soil. They are found in longleaf pine sandhills, pine barrens, scrub oak areas, dry rocky areas at high elevations in the Appalachian Mountains, and abandoned agriculture fields.

Typical length of this species is slightly over four feet, and maximum length approaches eight feet. 

Pine snakes are extremely powerful constrictors and feed on a variety of mammals, including rabbits, squirrels, rats and mice. They also climb trees in search of birds and bird eggs, and, as you discovered, will enter chicken coops in search of eggs.

When threatened or cornered this species is famous for emitting a distinctive, ominous hiss. They sometimes bite if handled, but you can often pick them up without suffering any injury.

Habitat destruction and highway mortality are the two main threats to this species.

For additional information on pine snakes, go to:

http://myfwc.com/wildlifehabitats/imperiled/profiles/reptiles/florida-pine-snake/

https://www.floridamuseum.ufl.edu/herpetology/fl-snakes/list/pituophis-melanoleucus-mugitus

https://srelherp.uga.edu/snakes/pitmel.htm

Two excellent field guides for snakes in your area are:

Gibbons, W. & Dorcas, M. (2015). Snakes of the Southeast. Athens: The University of Georgia Press.

Gibbons, W. (2017). Snakes of the Eastern United States. Athens: The University of Georgia Press.