Probably between 16000 and 22000.
i think 20 to 45,000
I researched this question and apparently: "Dogs hear high tones in particular much better than humans do. Humans can pick up an average of 20,000 acoustic vibrations per second (kHz), whereas a dog is able to perceive between 40,000 and 100,000 vibrations." Although dogs can hear pretty well compared to humans, bats can detect twice as high a pitch as dogs.
Typically, a dog whistle is within the range of 16000Hz to 22000 Hz. Some dog whistles have adjustable sliders for active control of the frequency produced.
30 Kilometers
Alaska. Ever hear of the Iditarod?
It depends on the individual whistle. The typical dog whistle has a range of 16,000 to 22,000 hertz. If one is 22,000 hertz, a human will barely be able to detect it, but it won't be a problem for a dog.
Depending on what type of dog whistle, they probably can hear at least some of the sound frequencies. Although I know of no research on this particular subject it is entirely likely that they can.
You can't hear it because it is such a high note and dogs can hear better and high notes then us.
if you can hear its heart the animal is okay but if you really hear its insides take it to a vet Most likely what you hear is food digesting. Many kids like to lay their head on a sleeping dog while playing or resting and are concerned about the sounds emanating from the dogs mid section. Digestion is a continual process even when the dog has not eaten for a while. Digestive juices are still present and making rumbling/gurgling sounds.
How many hours to take your dog what? For a walk? If you DO mean for a walk, it all depends on the size of your dog but approx 30-45 minutes/day will keep dog happy!
Cats hear better then dogs.
they hear your tone of voice or speak in dog language