A female boxer dog typically stays in heat for about 2 to 3 weeks. The heat cycle, also known as estrus, is divided into four stages: proestrus, estrus, metestrus, and anestrus. During the proestrus stage, which lasts around 7 to 10 days, you may notice swelling of the vulva and a bloody discharge. This is when the female is attracting males but is not yet receptive. The estrus stage, lasting another 5 to 14 days, is when she is fertile and will accept male dogs. After this, the metestrus phase occurs, which is a period of hormonal changes, and finally, the anestrus phase, which lasts until the next heat cycle. It's important to monitor your boxer during this time to prevent unwanted breeding and to ensure her comfort.

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Boxer Dogs Dog Care Heat Cycle Female Dogs Reproductive Health