I carry dolavs of beef and they drip blood all over. Real pain to get off if left to dry.
Chickens fresh from slaughter are the worst, leaves a slimy stinky juice all over the floor, the smell stays forever if you don’t use a disinfectant as said.
Lucky most of my drops have a wash setup and let me rinse out there if needed.
In the past I have seen supermarket fridge trailers with actual mushrooms growing from the cracks in the corners, disgusting.