Thomas Mcguinness of Port Charlotte allegedly posted a photo of himself appearing to be holding a gun and pointing it at a cat.
After he posted the photo, which has since been taken down, Mcguinness posted: "Don't know why everybody so mad about a cat we only shot it twice."
Facebook users reported the post to the Charlotte County Sheriff's Office and Animal Control.
"To see something like that it just turns my stomach," Port Charlotte Animal Welfare League Executive Director Sharon Thomas told NBC 2. "Just to pretend you're doing it or to think that it's funny in any shape or form is criminal to me."
There are also allegedly photos on Facebook of Mcguinness pointing a gun at a dog and himself.
"It angers us beyond belief," Charlotte County Animal Control Division Manager Lt. Brian Jones said. "That's a confession where I come from if we found a dead cat."