It has been the trend in the past to only interview LA and Arkansas applicants, so I doubt they'll be doing it differently this year.
As far as improving your application... well, I've found that this year's class (my class) is very diverse; we have a large number of students with varying degrees and types of experience. So, I suppose that would be my advice to you- if you're GPA/GRE are up to par, then try varying your animal experience: research/large animal/exotic, etc. When I interviewed there, much of the focus was on the different types of animal experiences I'd had, and what I learned from them.
Good-luck with all your apps, and if you have any specific questions about LSU (since I don't believe Lynnkat is an LSU student- could be wrong, though 😉 ). Anyway, I'd be more than happy to answer them. ^_^