I remember when I was a child and had a pet yorkshire terrier
getting a call from the vet 1 afternoon during dinner, sorry, roxy (the yorkshire terrier) didn't make it
it was so sad, what some people don't realise is that pets are just as much as part of the family as humans are, and to me, it was hard to process (for weeks after I could hear her bark, or I thought I heard it)
my sister has also lost a pet mouse and she was devistated, she actually buried the mouse at the seaside, and for weeks after would go and see it
sorry about your doggy