Their troubles now seemed to be over and they were congratulating themselves on their safe progress, when they struck a series of fifteen rapids. When passing the last Sergeant Gass's "canoe struck, and a hole being made in her side she immediately filled and sank. Several men who could not swim clung to the boat until one of our canoes could be unloaded, and with the assistance of an Indian boat they were all brought ashore. All the goods were so much wetted that we were obliged to halt for the night and spread them out to dry. While all this was exhibited, it was necessary to place two sentinels over the merchandise, for we found that the Indians, though kind and disposed to give us aid during our distress, could not resist the temptation of pilfering small articles." The Snake River was in general very beautiful, but it was filled with rapids, most of them difficult, and one strewed with rocks, most hazardous. Food failing, except fish and roots, they concluded, probably at the suggestion of their Frenchmen, to change their diet, and being again reduced to fish and roots, made an experiment to vary their food by purchasing a few dogs, and after having been accustomed to horseflesh, felt no disrelish to this new dish. The Chopunish have great numbers of dogs, which they employ for domestic purposes but never eat, and the practice of using the flesh of that animal soon brought the explorers into ridicule as dog-eaters. "Fortunately, however," says Clark, "the habit of using this animal has completely overcome the repugnance which we felt at first, and the dog, if not a favorite dish, is always an acceptable one." Elsewhere he adds, "having been so long accustomed to live on the flesh of dogs, the greater part of us had acquired a fondness for it, and our original aversion for it is overcome by reflecting that on that food we were stronger and in better health than at any period since leaving the buffalo country."