Dogs sniffing butts is their way of socializing
Bichon Frise (detailed introduction)
Whether familiar or unfamiliar dogs, the first thing they do when meeting is to sniff each other's butts. Many owners often think this action is a bit dirty, but this is exactly a social way dogs greet each other. Some dogs do the same with cats.
Dogs can judge the other's gender, condition, and even compatibility through this method. The scent from the secretions of the buttocks acts like a business card—an excellent way for dogs to introduce themselves. Recognizing the other's gender and status in the group is a top priority in dogs' social life. Through eye contact and distinguishing the scent from the buttocks, face, and other parts, dogs quickly understand how to get along with each other. Therefore, next time your pet sniffs another dog's butt, don't feel embarrassed, just say: Great, nice to meet you!