The dog was just being a dog.
I think the solution for your problem (keeping it from happening again) is very simple: NEVER let the dog outside unattended. PERIOD. Until your chickens run is completely secured, the dog should not be out unsupervised.
You should also apologize to the dog for...
I am mostly upset at myself for not securing the run and the young chickens good enough. I just want to figure out if there is someway to keep this from happening again. I want chickens and love my stupid, dumb dog. Any ideas?
The dog was just being a dog.
I think the solution for your...