The convention is attended by a good number of families, and the exhibit areas are designed to be safe for children — the guns on display are disabled, no live ammunition is exhibited (canine sweeps will check daily for gunpowder), and attendees carrying weapons are barred from unholstering them. Manufacturers will be showing off their latest models, but firearms will not be on sale on-site as they would be at a gun show.
Gunpowder sniffing dogs in a room full of gun nuts? Those dogs are going to be acting like a hippy in a field of ganga. I’m going to bet they mean explosive sniffing dogs, and someone drew some conclusions. But I’m going to guess that the dogs aren’t present to root out live ammunition. My understanding is the primary safety precaution for guns on the floor is that their firing pins have been removed.