Not is in this situation, but I would if I thought the dogs needed attention.
If you observe dogs being abused and/or neglected, then by all means contact the appropriate person. I'm not sure who the appropriate person would be - German Shepherd Club, animal welfare & rescue groups, RSPCA, Animal Control people?
Dogs don't have a voice so if you think they need help - by all means do what you have to do.
I have contacted animal control but it was to do with an aggressive american staffy that kept attacking every single dog it saw, owner ended up euthanasing the dog because the dog turned on her, so this was a different situation to yours. But you are home and you are seeing what is going on, if you feel the dogs need help, then do what you can for the dogs.