At our house, the dogs spend a lot of time snuffling the floor. We call it "trolling" (as in fishing where you "troll" the line through the water hoping to catch something). Trolling is a time-consuming activity. Our dogs can make a real project out of it.
Frequently, the results of trolling are somewhat disgusting. This is the floor we’re talking about, after all. After a hard day of sleeping in my office, the dogs come upstairs at night. All four canines then need to thoroughly troll the upstairs area in case anything good fell on the floor in their absence.
Apparently, you just can’t be too vigilant when it comes to trolling. Sometimes the cat has killed or tormented some insect that needs to be consumed. Sometimes some sloppy human drops a crumb of potato chip that *really* needs to be consumed. Such exciting finds are referred to as "scoring." As in "Cami just scored a piece of floor crud." When one canine trolls successfully and scores, much excitement ensues and the other canines mill around to see if there’s any more to be found.
Trolling is not limited to indoor activities either. On the daily walk around the forest, certain spots must be snuffled regularly to see if anything important happened in the last 24 hours. Any number of revolting items may or may not be consumed, depending on whether the human is paying attention and issues the largely ineffectual "no eating!" command.
Having all that olfactory input must be exhausting, since most heavy duty trolling sessions slowly wind down and eventually degrade into a heavy duty sleep session. Vigilance only lasts for so long, and trolling is only fun as long as *somebody* is scoring.