You can tell when a dog is in heat by observing a combination of physical and behavioral signs: Physical Signs:
- Swollen, red vulva that is noticeably larger than usual.
- Vaginal bleeding or discharge, which may start as bloody and then change to a yellowish or brownish color.
- Increased urination frequency.
- Licking the genital area more than normal
Behavioral Signs:
- Changes in social behavior, such as being more clingy or nervous.
- Increased receptiveness to male dogs, including allowing mounting and sometimes mounting other dogs or even humans.
- Tail position changes, often held to the side to signal readiness to mate.
- Roaming behavior to find male dogs.
- Possible aggression toward other dogs or anxiety
The heat cycle typically lasts 2 to 4 weeks, with the most fertile period around day 10. The cycle has four stages-proestrus, estrus (when the dog is receptive to males), diestrus, and anestrus-with distinct signs in each phase
. If you notice these signs, your dog is likely in heat. Managing her environment carefully during this time is important to prevent unwanted pregnancy and to support her comfort
