I just found out she died last night, but hey, thanks for the speedy response.
I'm so sorry about what happened here. It sounds like this was a Pulmonary Embolism. That is quite serious. It's so sad as she was young, and you had bonded with her and cared for her. It's a terrible shame.
I have no idea what could have caused this to happen.
Anyway, all I can say is I'm sorry because you must feel so sad about losing her like this.
Thankyou Ginger. I was really upset when I wrote the comment yesterday, I'm sorry if I sounded short. I am very sad. The vet told the shelter that it was the heart worms that did it, is that possible?
That's alright. You were feeling very upset, and I understand that. I noticed your question had gone quickly down the list, and had been missed probably because of that. If a lot of people post all at once, unfortunately that can sometimes happen. I go down the list when I can, and even if I don't know the answer, I 'bump up' the post so that others will see it.
It sounds to me like it is very possible the embolism could have been caused by heart worms. They can affect the lungs and pulmonary artery.
I know how sad you must feel.