dragonflycat, I am so sorry about Toby. It could possibly have been Hemangiosarcoma. The symptoms of that can come and go, ever so slightly -so a dog might have a day or so when he seems a bit "down" but then is fine again, and quite happy to run about....and then suddenly can die from internal bleeding.
dragonflycat, PeteyLover and NicosMommy......It hurts so much when they have gone, I know how much. And yes passing in their sleep is a blessed thing compared to a long and devastating illness. But it comes as a shock to us. And we shall always wonder why. And we will miss them the rest of our lives. We don't expect them to die, when they just lay down for a rest....it's horrible for us, and a dreadful shock.
smkovalinsky....I really feel your pain about your Eskimo dog. These things they go through -and even the added things they go through when we are ony trying to help them -do twist like a dagger in our hearts. I know. I am so sorry. It's awful.