As long as the sniff is not too intrusive - i.e. This tends to be around the canine ano-genital region. If the dog prods you - don't be angry just turn a little to your side and lean or move a little into the dogs space (be calm) and the dog will normally back-off. 1 0. Lv 7. Favourite answer. Dogs' amazing sense of smell is 10,000 to 100,000 times better than humans. Why Do Dogs Smell Human Beings or Owners? It’s a great source of information. They also have a special part of their noses called the Jacobson's organ that lets them ignore the smell of … These dogs smell not only the dogs’ rear, but the cat’s rear, and human crotch. The way dogs sniff genitals of other dogs is just one example. There are about 300 million sense receptors in their noses, versus the 5 million in human noses. Why dogs sniff other dogs The sense of smell is a dog’s primary sense. Answer Save. But, why do they sniff human beings? Sniffing another dog’s bottom is the canine version of Wikipedia! 8 Answers. Scent is like dog speak. Training can teach a dog to be a more respectable of your space. Studies have also shown dogs to be effective at detecting health conditions like cancer and migraines. When you own a dog for the first time, there are many things you have to get used to. So, a good bottom sniff is an expedient way for your dog to find out the other dog’s gender, age, mood and much more. 1 decade ago. Wee Trojan. Relevance. Before getting creeped out, understand that dogs are able to sniff out bladder cancer cells in urine, identify ovulating cows, locate bed bugs and the list goes on. 1 decade ago. 1 0. They also have a special part of their noses called the Jacobson's organ that lets them ignore the smell of poop when they sniff another dog's … Plus, evidence shows dogs are able to sniff out human pheromones, which fluctuate, depending on hormonal changes. A butt sniff for dogs is like a handshake for humans. So, while your dog may recognise the shape of another dog by visual means, a lot more information can be gathered by sniffing them up close. This is because a dog’s anal glands contain the most potent scent. When a dog sniffs another dog's bottom, he's actually gathering information about the other dog's gender, diet and emotional state. When dogs sniff each other's butts, they aren’t just huffing stale fart fumes, but “speaking with chemicals,” as the American Chemical Society puts it. Human, cats, other dogs. They love all bottoms. A dog’s nose contains nearly 300 million scent receptors, compared to a human’s 5 million.In addition, the part of a dog’s brain that processes smell is 40 times greater than ours. This behaviour can become even more awkward for owners when a dog chooses to greet a human visitor by putting their head between the person’s legs and have a good sniff of their crotch. 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