ULPT Extreme Snake Deletion

REQUEST !! Hello all, I need to delete a snake permanently.

My dog was killed on tuesday, august 6, by a cottonmouth snake. He was my first dog and therefore he was like my baby and was only 2 years old, I dont think ill ever be the same again.

I also have a second who is currently 9 months old, and I live with my mom who has his brother.

Since tuesday we have been very careful throughout the day for the puppies potty breaks, by either using leashes when going out to the yard, or putting them in a 6x6 cage for safety (Only for bathroom breaks outdoors).

I saw the cottonmouth tonight waiting outside of the cage, he wants to kill my second baby.

Please how can I safely delete him??? I threw bricks at it but we have it rather bushy so he can hide easily. I wanted to use a shovel on him but because of the bushy area and the close-range of the shovel, Its dangerous and could result in ER visit.

Im okay to try nearly anything as long as I get to do the final blow.

All tips will help.

Please.