My dog died.
She was the (very) older of the two. Really smart and sweet. I'm so tired of feeling sad.
Both dogs appeared to be grieving the other losses in our family, but she stopped eating. I took her into the vet. I have no idea what my finances are going to look like, so I couldn't hospitalize her. We tried other treatment over the last week, but she was getting progressively worse.
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I have treasured each and every one of my dogs, who got me through the worse of the worse in life.
May you find comfort with your remaining dog and peace in grieving together. 
I hope she went peacefully
We grieve for our furry companions who have been with us in good times and bad. They have given us so much to enrich our lives. Take care of you and your other fur baby, who is also missing her companion. Prayers for you both on the way to you! 
I had to say good bye to my sweet dog last week. The amount of grief seems to be equal to the amount of love.
Even when they’re old and sick and in serious undeniable decline. It’s STILL hard as hell to let them go. Been there. I’m still struggling with it, and still missing them deeply and dearly as I know you are right now.
I think we all not only understand that, but have had to walk in those shoes, also. It’s so hard to say goodbye. Even as you want their pain and suffering to end. So sad that it means they end, also.
…”merged with the universe.” It was a thought I found somewhat comforting. In our family, we call it liberating the spirit.
One of our vets once said to me that we bring our animals into our lives, knowing that we will outlive them, but we choose to do so anyway because our lives are so much richer for the being in it.
It sounds as if your beloved dog was ready to move on and you did the loving thing by listening to her. It’s always hard, even when it right.
I am so sorry Ilsa, no words can express this loss.
they are family, maybe more, maybe these little critters are angels among us.