Here's why:
* Neutering doesn't instantly stop all hormones: While neutering removes the testicles, it takes time for the testosterone levels to drop significantly. The dog might still exhibit some signs of interest in females for a few weeks.
* The female's cycle is controlled by her own hormones: A male dog's hormones have no direct impact on the female's estrous cycle (heat).
* Pregnant females are unaffected: If the female is already pregnant, neutering the male won't affect her pregnancy.
However, there are a few things to consider:
* Potential for unwanted mating: While neutering doesn't immediately stop all sexual behaviors, it significantly reduces the risk of the male trying to mate with the female.
* Risk of infection: It's generally advised to avoid surgery during heat due to an increased risk of infection.
* Recovery time: It's best to wait until the female is out of heat to neuter the male so that the surgery and recovery period don't coincide with the stressful time of her cycle.
If you have a male dog and a female in heat, it's best to consult with your veterinarian to determine the best course of action. They can assess the situation, advise on the timing of the neutering, and ensure your pets are safe and healthy.