I wrote them an email and realized it summed up much of how I felt about Chewy; so I thought I would share it:
My heart goes out to both of you. You made the right decision to not wait. Chewy died at home in April from pneumonia in his lungs after returning from the vet with a hopeful diagnosis. If I or the vet had known he was not going to make it, we would have spared him the discomfort and embarrassment he surely felt.
As sad as it is to hear the news; it is wonderful that you were able to give Annie a loving home for so long and that Lucy had the benefit of getting to know her. From all your pictures and stories Annie was a wonderful and happy dog.
It does take time for the sadness to not be overpowering and the memories that keep coming up to be the happy ones and not just the ones from the final days. So far a day hasn't passed that I haven't had a though about Chewy; and every time that I do I am a little sad. But I also remember all the silly and loving things he would do and I realize that it is impossible to not miss someone like Annie or Chewy who brings such amazing happiness to our lives.