In short, no, female dogs do not have periods in the same way that human females do. While mammals of all sorts — including dogs and humans — share the same basic reproductive organs, the ways those organs function is not similar. read more
Female dogs do not have periods per se, but they do go through a regular heat cycle if they have not been spayed, or desexed. The average heat cycle for a dog is anywhere from 1 week to 4 weeks in length. read more
Female dogs do not menstruate in the way that women do. Instead, dogs have an estrous cycle, more commonly called a heat cycle. Sexually mature female dogs go through heat twice, or less commonly once, every year. read more