What Happened?, sudden death Options

[Balin's mom]

Two days ago was like any other Sunday with Balin hanging around and being my faithfull companion at home, I remember I saw him looking for a nice place to lay down while he can see me doing chores around the house, all of a sudden he started with vomit and I thought "ok Balin what did you eat? as usual he might found something on the floor or in the back yard" .
In a matter of hours I was rushing to the emergency room because he did not wanted water or food and he didn't make it, he stopped breathing just a block away from the vet's office, and even they try to resucitate him, nothing could be done.
Today I still can't believe he is gone, is so hard to think that he is not at home anymore, he has been with the family since he was 2 months old, he was 10 years old and was my best friend. This two days had been a nightmare because I can't understand what happened, he was a healthy, playfull dog he was the baby of the house and all of a sudden he is gone and I cannot feel a single moment at peace because I can't stop thinking that I should took him earlier to de doctor and he might be here now.
It hurts so much not to have him now.

I MISS YOU BALIN
MOM