Your dog probably has a lot of weird behaviors. Learn why he does them and where he learned them with this list of 25 random dog behaviors explained.
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Sniffing each other
Image source: umemurajp
Much like humans shake each other's hands, dogs sniff each other as a form of greeting. The most popular sniff region is the bottom, as that is the area that has the strongest odor. You may also see a dog sniff another's ear or all over their body to really get a good whiff of who they are.