Crap, I opened this cute thread, thinking it was new then I came to the above post. That's awful. Really sorry. I knew chocolate was bad for them, but did not know about caffeine. Of course, caffeine is in chocolate, so that's probably why. I'll remember that.
When my last dog, Ash, died at 13 years, it took me 14 months before I could get another dog. My current dog, Chewy, turned 6 on February 6th. I get really attached to these guys. I don't sleep well, if there's not a dog watching the house.
Take this time to grieve. There's no easy way to do it. I feel for you.