Hello,
Is it possible to have an isolated case of demodectic mange in 1 puppy  from a litter of 9 with no littermates having the mange? The puppies will be 1 year old in August. This was the mothers 3rd litter and the dads 4th litter. With no previous problems(honestly)or i would not be asking. . Is it possible the puppy got the dem mange from other stressful problems that were not taken care of by the owner and the dogs immune system was just that run down? New owner is saying the puppy had a diarrhea problem for months  that her vet could not diagnose.Thought it was from eating sand??? Is this possible or should I never breed my female and male again? I truly believe people should not breed dogs that get the mange. Any input would be greatly appreciated. Thank you.

All dogs carry the demodex mite, most with absolutely no ill-effects whatsoever - it's passed from mother to pup while in the nest. However when their immune system is under stress the demodex can take a hold. It's these dogs that shouldn't be used for breeding.
:)

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