God damn, I am sooo sorry to hear about this!
I did read here a few weeks back about the hops toxicity for dogs and I'll tell ya, I'm a noob brewer so the information from people like you and those prior DO help others.
You know... I hate to be the guy to suggest a sticky, because mods often don't want a board full of 20 stickies and I understand that... but maybe this should be a sticky under the beginner section, just especially for newcomers to homebrewing (not saying you are by any means but it would probably be best stickied there). I have two mini-pinscher's that I look at as my children and if anything ever happened to them I would be destroyed emotionally. I know how bad chocolate is and in the vet's office there's a poster on other poisonous items people wouldn't even think of, even typical backyard plants.
Sorry for your loss man
Rev.