Many people know that Teddy dogs have a strong sexual drive during heat. At that time they may use many objects as outlets for instinctive behavior. So when exactly does a Teddy come into heat, and how long does the cycle last?

The Teddy's Heat Cycle
Normally, a Teddy comes into heat twice a year, usually once between March and May and once between September and November. When a female Teddy is in heat, both her body and behavior show obvious changes.
1. Proestrus
This stage lasts about seven to ten days. The reproductive system begins preparing for ovulation. The eggs are nearing maturity, the epithelium of the reproductive tract starts proliferating, glandular activity becomes stronger, and secretions increase. The vulva becomes congested, swollen, reddish, moist, and slippery, and bloody mucus may be discharged. Male Teddy dogs are often attracted by the scent during this stage, but the female still does not allow mating.
2. Estrus
This is the stage when heat signs are most obvious and the female accepts mating. It generally lasts about six to fourteen days. The vulva remains swollen but becomes softer, the mucus becomes lighter in color, and bleeding decreases or stops. The female actively approaches male dogs, lowers her waist, angles her hindquarters toward the male, moves her tail aside, and allows mating. Ovulation usually begins two to three days after estrus starts, which is the best time for breeding.

3. Post-Estrus
Swelling of the vulva gradually subsides and the body begins returning to normal. The dog's temperament becomes calmer, and she no longer allows male dogs to approach. This stage usually lasts about two months, after which the dog enters anestrus. If she has become pregnant, then this stage is followed by pregnancy.
4. Anestrus
During anestrus, the reproductive organs are inactive. This period generally lasts about three months, after which the next proestrus begins. Male Teddy dogs do not have a regular heat cycle. During breeding seasons, when nearby females are in heat, the male's testes become more functionally active, and the scent of a receptive female can easily trigger excitement and mating behavior.