The text suggests that a dog can determine the time of his master's return by the amount of scent left in the house.

The claim that dogs can determine the time of their owner's return by the scent left in the house is supported by some evidence suggesting dogs have a highly developed sense of smell that allows them to track time through scent decay. However, the evidence is not from highly authoritative sources, and there is no professional fact-check available. Therefore, while the claim is plausible, it lacks strong corroboration from high-quality sources.