Dog ate whole marijuana chocolate bar, will he die?

My dog just ate a 6 piece hash oil chocolate bar. I don't know the strength of the hash oil, but it was strait from a clinic, so it's strong. The chocolate was milk, so not as deadly as dark chocolate. My dog is 20-30lbs. A biscon frize or however you spell his breed. Will he be okay? Please respond quickly, I'm really worried. :/