While the original title, “Trailing the Killer” isn’t a misnomer, it was a bit misleading since the “trailer” is a dog named Caesar Caesar the Dog) and the killer is a mountain lion, aka as a cougar or puma the narrator was quick to point out. But the makers also pointed out that Caesar “is the most intelligent dog actor since Rin-Tin-Tin” which probably lured a few Rin-Tin-Tin fans with a show-me attitude. Caesar prowls around the woods of the Northwest, dispatches a rattlesnake, visits his she-wolf mate and their pups, pauses to watch the dainty habits of a raccoon personally washing every morsel of food before eating it—and that raccoon had enough food to use up several minutes of running time—and then saves sheepherder Pierre (Francis McDonald)) from getting et up by one mean mountain lion. Rin-Tin-Tin he ain’t, but then who was? Commonwealth changed the title to “Call of the Wilderness” when they acquired it for 16mm rental to the school market.