A dog's sense of smell is 10,000 to 100,000 times more acute than humans. They have up to 300 million scent receptors
Smell
Dogs can learn the names of over 1,000 objects. Border collies are the smartest, poodles second, then German shepherds for obedience.
Smarts
Dogs see well in dim light thanks to a special retina layer but can't distinguish red, green and similar shades like humans do.
Vision
Dogs only have around 1,700 taste buds compared to humans' 9,000. So they savor smells over flavors when eating usually.
Taste Buds
Dogs sweat excess heat and waste chemicals through the pads of their paws instead of skin pores like people.
Paw Sweat
Research found classical music appeals most to canines over other genres based on their calmed heart rates while listening.
Musicians
Dogs love sniffing the sweet, yeasty aroma of human ears which smell like appealing snacks to their sensitive nose brains.
Ears Smell