You want to know why your dog perks up 
long before you hear someone walking up to the door? 
Dogs hear up to 50,000 to 65,000 cycles per second – humans, just 20,000.
Dogs have 18 or more muscles in their ears allowing them to be mobile.
Dogs hear about 4 times the distance of a humans. 
Dogs hear ultrasonic frequencies like 
dog whistles 
a squeaking mouse or 
whistling hearing aids!
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So, remember to open the battery door whenever your hearing aids are not in use,
 so your dog isn't attracted to the high frequency feedback.
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Well speaking of dogs, here is Jade my family pet and therapy dog who would never does anything wrong!
