I don't keep a collar on Ava unless I'm walking her. Poor Leki's tragic accident is similar to what happened to two Goldens who lived down the street from me. They were in the backyard playing while their owners were away, and the whole block knew immediately that it was awful.
This is an old thread, but there's some good info in it. Doggie daycare has been a lifesaver for me. It gives Ava an outlet for her endless energy and is good for socialization. She is a friendly girl who likes everybody– human, canine and feline. I take turns handing her off to everyone there, and so far, she'll go right to them with a hello lick. I want her to know that people are good and she can trust them. Hopefully, it will always be that way!