Every airline has their little quirks, but I can say that I iced meat in a cooler and taped it with duct tape and was not hassled.

Here's a tip: Airlines typically charge a fee for additional baggage (or in this case, a cooler full of meat). For example, coach can check in 2 bags with a $85 charge per additional bag. They sometimes offer first class upgrades for a small fee when checking in. First class gets 3 bags! So this year I upgraded (on the way home from South Dakota to New York) for $35, got to ride first class, and avoided the $85 fee to transport my meat.