The distance at which a dog whistle can be heard by a dog can vary based on several factors, including the frequency of the whistle, the dog's hearing ability, environmental conditions, and background noise.
Dog whistles typically emit high-frequency sounds that are above the range of human hearing, typically between 20,000 to 25,000 Hz. Dogs, especially those with keen hearing, can detect higher frequencies than humans.
While it is difficult to provide an exact distance, it is generally believed that dog whistles can be heard by dogs within a range of 50 to 400 meters, depending on the factors mentioned above. However, it's important to note that individual dogs may have varying sensitivities to different frequencies and distances.
Keep in mind that using a dog whistle should be done responsibly and considerately. It's crucial to avoid causing discomfort, stress, or harm to the dog or other animals in the vicinity.