Marcela Goldberg, who runs local animal shelter Mascotas Coyoaca, heard about a seven-month-old golden retriever mix chained to a bench in a nearby park. When she went to find the pooch on November 22, she discovered him along with a heartbreaking handwritten note.“It hurts a lot to leave my dog here but I made the decision of leaving him because my family used to mistreat him and it would always hurt me to see him in that condition,” the note read.