Sort of, I'll put it in spoiler-text to spare those that may be easily offended or squeamish. [spoiler]I was about nine or so and I came home from school and noticed that our German Shepherd was coughing up blood. I went to get my dad and we ended up taking him to the neighbors' house (older couple, wife used to be a vet). Turns out, our [i]other neighbor[/i] (who was kind of a dick and didn't like our German Shepherd) had fed our dog a piece of meat that had soaked in anti-freeze. The antifreeze had already been the dog's system too long and he was past the point of no return. We didn't live close enough to an animal hospital. I grew up in kind of a rural area. My dad took me inside our neighbors' house and the husband took my dog to the backyard and killed him in the most humane way available, shot him. We never did find enough proof to pin it on the neighbor that did it; we found the remnants of some meat soaked in antifreeze but no way to say that it was him. I did catch his kids shooting their pellet guns at some of our beagles a few years later. Called the cops on them and they got in trouble. [/spoiler] That said, my condolences OP. I know what it's like to lose a pet. Most of mine died due to old age (and went in their sleep) but it's always a hard thing to deal with.