I had a older golden retriever of good health and a 2 year old labradoodle who basically up and died on me in the same way, a few years ago. My golden who just got a clean bill of health from the vet the week before was very lethargic and week, I took him to an emergency vet, who could not figure out what was wrong, I took him home. He started having seizers, and died at the end of my bed. I did not know my doodle was sick. I found him dead in my closet in the morning. Another time I had used flea medicine on my cats, the drops, and I remember that is smelled so bad, like I had dumped a bottle of pesticide on them, that I knew it did not smell right, so I immediately washed them to get it all off, good thing I did, or I may have not had my cats, either. This is horrible. My hear goes out to all the people who have lost their pets so unnecessarily, like my Tuffy, I had him since he was six weeks old, and he died horribly, and my angle Sully, who never had a chance.