Most of it's natural life
You can't hear it because it is such a high note and dogs can hear better and high notes then us.
Cats hear better then dogs.
they hear your tone of voice or speak in dog language
The sounds animals can hear is based on the frequency that the certain animal can hear. For example, dog's can hear at much higher frequencies then humans can, so if a sound is made that is above our capability of hearing, we will not hear the sound, but the dog will.
Like any other dog they hear with their ears.
Dog senses are smell, taste, look, listen and hear
get a muzzle maybe? (for the dog obviously) :)
yes
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.
The frequency of the sound is too high for humans to hear, but dogs have more sensitve ears and can hear at higher frequencies.
There is a dog whistle that only dogs can hear because they can hear higher frequencies than humans. However, it has been found that both dogs and kids can hear, but adults can't. This is because as people age, they are not able to hear sounds above a certain frequency. The pitch, in other words, is too high for them. Being able to hear a dog whislte only means that you can hear higher frequencies.
A dog urinates himself.