Hey, I really need help here. PLEASE FIND THE **MAIN IDEA** AND HAVE **AT LEAST 3 SUPPORTING DETAILS**
My original main idea (A dog's sense of smell is estimate dto be 10,000 to 100,000 times better than that of a human) was incorrect :(

Dogs are both familiar and yet fascinating creatures. To appreciate their “otherness,” all you need to do is consider their world of smells. 7 My dogs and I have very different experiences when we walk a trail. I marvel at the beautiful autumn day. But my dog's head plummets to the ground as soon as we start walking, seemingly ignoring the wonders around them.   8 However, they are appreciating something I can’t perceive: the scent of the fox who ambushed a squirrel last night, the lingering odor of the dogs who’ve walked this way, and the footsteps of my neighbor, who last wore her hiking shoes in woods my dogs have never visited.  9 You’ve probably heard about dogs who sniff out cancer, weapons, or even coronavirus. These dogs are not special in their nose power: Your dog could do the same thing! In fact, the first dog to sniff out cancer sniffed a mole on his owner’s leg so frequently she went to the dermatologist. There she was diagnosed with melanoma. 10 A dog’s sense of smell is estimated to be 10,000 to 100,000 times better than that of a human. This is primarily because of the huge difference in odor processing in humans and dogs. 11 While we have about 6 million olfactory receptors, dogs have a staggering 300 million. Their epithelium, or nasal tissue, is about 30 times larger than ours. And while people have between 12 million and 40 million olfactory neurons, some dog breeds can have 220 million to 2 billion! 12 How can you even imagine this breathtaking difference in abilities? This disparity is like detecting one teaspoon of sugar in enough water to fill two Olympic-sized swimming pools. 13 Now that your mind has been blown about your dogs' incredible sense of smell, you can use this information to make your dogs happier by taking them on the occasional “sniffy walk.” Do this by taking your dogs out, letting them lead the way, and allowing them as much time to smell as they would like. Such walks can make dogs happier because they gain lots of information about the world around them.