Whistle Labs Inc. is a subsidiary of Mars Petcare headquartered in San Francisco, California.

[1][2] The company started with 20 employees and raised $6 million in a venture funding round led by DCM.

[3] Other investors included the former CEO of Mars Petcare and the President of Humane Society Silicon Valley.

[1][5] A February 2014 agreement with PetSmart placed the Whistle device in all the company's stores and led to co-marketing efforts.

[7] For example, in 2014 the Pennsylvania School of Veterinary Medicine at the University of Pennsylvania used data from Whistle devices for their research on chronic pain conditions in dogs;[8] and researchers at the College of Veterinary Medicine at North Carolina State University have used it to study epilepsy in dogs.

The Whistle Activity Monitor, which is sometimes called a "Fitbit for dogs", tracks the duration, time, and intensity of a pet's exercise, then gives the data to users over Wi-Fi networks or to a phone app using Bluetooth.