Couldn't the tag the dogs ? The picture indicates the dog has no tag.
> The sheep were still grazing on the other side of the fence, but their guardian had vanished.
> ...
> According to Wissner, his dog was wearing a collar with a rabies tag and a halter bearing a plate with his name, address and contact information.
The caption for the photo:
> Shepherdess Brittany Cole Bush with a herd of goats on the Arambel Ranch in western Wyoming. (Brittany Cole Bush)
> According to Wissner, his dog was wearing a collar with a rabies tag and a halter bearing a plate with his name, address and contact information.