Can golden retrievers have black puppies when the mom was breed with another retriever?

It's very rare for a Golden Retriever to have black puppies, even when bred with another Golden Retriever. Here's why:

* Genetics: Golden Retrievers have a gene that determines coat color, and black is not a typical expression of that gene. The genes responsible for the golden coat color are dominant, meaning they suppress the expression of other coat colors, including black.

* Rare Exceptions: While extremely unlikely, it's possible that a Golden Retriever could carry a recessive gene for black coat color. If both parents carry this recessive gene, there is a slight chance their offspring could inherit the black coat color. This is why it's important to research the lineage of any Golden Retriever you are considering breeding.

In summary:

* A Golden Retriever having black puppies is extremely rare.

* It's much more likely that a black puppy in this situation is actually a mix breed.

* If you are concerned about the potential for black puppies, it's important to talk to a veterinarian or a reputable breeder.

Let me know if you have any other questions!