Aww...poor Molly. I started crying when I was reading your post. It's so hard when a pet dies, especially when it's completely unexpected, like Molly b/c she was young. ((((hugs))))
ETA, my sister has two weimeraners and she also told me about their tendency towards heart problems. She said to tell you her heart goes out to your mother, too.
aww, I'm sorry halleybird. It's hard to lose a doggie. Maybe she'll meet my Allie up in doggie heaven. It sounds like she went peacefully, at least. Best wishes to you and your mom.
I am so sorry for your loss. All I know is that when our Golden passed away a few years ago that they tend to try to hide when they know it is their time. Send my love to your mother during this hard time.