To find out what sex
Dogs sniff each others butts because it is their way of saying hello
They sniff each others butts, like other dogs.
It's their from of saying 'Hello' like we shake hands
most of the time they sniff each others butts like dogs, but sometimes they might chatter at each other wich is normal.
When dogs sniff each others butts it's like when we shake hands. It's a greeting. (Don't go around sniffing people's butts.)
It's the same with dogs, they want to know each other's scent. If they know their scent, they won't be afraid of each other.
Some think that dogs sniff each other as a way to greet one another. Others don't know. Sometimes other dogs have gotten into mischief and have an unusual scent on their fur. I hope this helped. Just note their sniffing is NOT a bad thing it's normal.
they sniff each others bum
They are getting used to each other or their mating!!
They're getting to know each other.
sniff each others butts and things
To communicate, lions sniff each other and roar.