The dog, nicknamed "French Fry," was about three years old. She was found in late April just outside the dog park area of Peters Park.
Witnesses said they saw a man and a woman, both wearing masks, with the dog before walking away. Investigators are currently reviewing surveillance video and are trying to identify the dog's owners.
French Fry was brought to a veterinary hospital, where it was revealed she had intervertebral disc disease (IVDD).
"Given the severity of the disease and the further possibly life-threatening complications which may have developed, surgery was not an option for French Fry, and the decision for humane euthanasia was made in order to end her suffering," the ARL said in a statement.
Anyone who recognizes the dog is asked to call ARL’s Law Enforcement Department at (617) 426-9170 x110, or email email@example.com.
(Photo: Courtesy of the Animal Rescue League of Boston)