Chaser (dog)

Chaser (April 28, 2004 – July 23, 2019) was a Border Collie with the largest tested memory of any non-human animal. Chaser worked with Professor John W. Pilley, at his home in Spartanburg, South Carolina, from eight weeks old, until Pilley's death in June 2018. She was trained in a formal research project. Chaser could identify and retrieve 1,022 toys by name.
On July 23, 2019, Chaser died from natural causes, at the age of 15 years, in her home in Spartanburg, South Carolina.