I stopped there about a month ago as I passed thru Jackson, and my impression was the zoo was in desperate need of funds. I saw simple maintenance type things not being done like landscaping maintenance falling behind, windows that haven't been cleaned in a while, buildings and walkways that could use a good pressure washing, etc. All signs that they are cutting expenses and afraid to spend any money.
While Jackson is (was) the only AZA zoo in Mississippi, I feel their draw is geographically limited. I would venture to say the people in the northern 1/2 of the state would go to Memphis before Jackson, and the people in the southern 1/4 would go to New Orleans, Baton Rouge, or perhaps Alexandria, LA first. Just my guesses.