Is it true that if a purebred dog bred by a mutt and then later bred to a purebred that they will now be purebred puppies?

No, that isn't true. What may happen is that the female may mate with more than one dog during her heat cycle and have puppies with different fathers. In this case, some puppies may be mixed breed and some may be purebreed.

Some folks believe the misconception that if your purebreed female is accidentally bred by another breed of dog or a mixed breed that she is "ruined" for future litters of pure breed puppies, but that is absolutely not true. Breeding a purebreed dog to a mutt or other pure breed has no effect on future litters.

No, a purebred dog is a dog with all of the qualities of the original dog type, with no genes from a different species. As soon as a mutt enters the lineage, some of the mutt's traits will be past down generation to generation, and will therefore not produce purebred offspring.

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