A hardware store I used to go to had two golden retrievers that roamed the aisles and had their dog beds behind the counter. I noticed one had a dent in his head and the other limped on his front leg-shoulder. When I asked about it, I was informed that the prior owner had committed suicide and first shot both his dogs. The dogs dragged themselves a half mile to a neighbor and the shooter did his best work on himself, because he died instantly.
The hardware store owner was a family friend, and took in the dogs. He felt the store, with constant activity and strangers would be the best environment for them to hopefully forget that trauma.