Doubtful - for the simple reason that fedex has cameras
everywhere, and unlike the police and bodycam footage, they have no dog in this fight, so they aren't going to mysteriously lose the footage.
So my guess - they set aside the very small percent of very funny smelling or leaking or ... packages (since lots of packages never see human hands, it would be a very small percent anyway) and then the police dogs sniff them.
If i remember, i'll see if i can find some earlier docketed cases and see if they describe whether they have police there all the time or not.
I honestly would not be shocked.
I live near a mcmaster carr warehouse that is about a million square feet (one of their larger ones), and they have local k-9 police out front 24/7 just sitting in their car near the entrance to the facility (AFAICT - they have been there every time i have ever done will-call, and when i asked the guy, he said they were there 24/7)
It would not surprise me that fedex's indy hub (which is 2.4 million square feet, and more important than this mcmaster carr warehouse) had local police k-9 units around 24/7.
Last but definitely not least, the indy hub is, IIRC, at the indianapolis airport. In that case, there would definitely be k-9 units and local police just hanging around.