Happened to me. My wife was walking our dog on green space opposite our house. Two very gentle Soi dogs had died mysteriously over the last previous two days, she saw another one that day and walked our dog away quickly, but our dog obviously ate something without my wife seeing it. Our dog was frothing and shaking within 10 minutes. Died even before we got to the vet. I wouldn't be able to control myself if I knew who it was. People who poison are themselves lower than animals.