I am so very sorry. Putting a pet to sleep is one of the hardest things to do and there is nothing anyone can say to make it feel better. Just know that everyone on this forum is thinking of you and your family and we all know that where Grace is going, nothing can ever hurt her, the sun is always shining and she can run and play and sleep and eat all she wants. And she'll be watching over you and waiting patiently till you meet again.

My deepest sympathies.