I just googled that phrase and there are over 128,000 hits. The LINK is about domestic violence victims being afraid to leave abusive situations because they fear their pets will be hurt by the perpetrator of abuse.
For more info, a few very helpful links are:
Why domestic violence victims don't leave | Leslie Morgan Steiner
The link between domestic violence and animal abuse
An upcoming conference on the LINK in Toronto in November 2019
Research and other resources on the LINK can be found at:
The National Link Coalition
Phil Arkow, the coordinator of the National Link Coalition, recently spoke at the Ontario SPCA.
Allie Phillips, former prosecuting attorney, author, and consultant, encourages the use of her trademarked Sheltering Animals and Families Together.