* Female Golden Retrievers can technically be fertile from as young as 6 months old. However, it is not recommended to breed a dog before she is at least 2 years old, as she is still developing physically and emotionally.
* Fertility begins to decline gradually as a dog ages. This decline usually begins around the age of 6-8 years old.
* Most Golden Retrievers reach the end of their reproductive lives around 8-10 years old, but this can vary depending on the individual dog's health and genetics.
It's important to note that:
* A dog being able to physically give birth doesn't necessarily mean it's ethical or responsible to breed her. There are many factors to consider, such as health, temperament, and the overall needs of the dog.
* Spaying a female Golden Retriever is a safe and common procedure that can prevent unwanted pregnancies and reduce the risk of certain health issues.
It's always best to consult with a veterinarian for personalized advice about your dog's reproductive health and potential for breeding.