Hi,

I've had some experience with Demodex in dogs and I've done a lot of reading on it.

First of all: Is she spayed?
Usually demodex manifests itself moreso when the dog is near her heat. Her heat stresses and weakens her immune system thus facilitating the growth of her demodex mites.

I'm sure your vet knows if she can have an Ivermectin dip or not. I've treated dogs by having them dipped every few weeks and then treating the affected area/s with goodwinall twice daily. I've gotten very good results with that.

This should clear up as she gets older and her immune system gets stronger.

I would not breed this dog because the chances of passing it on to her pups is very high.