Parenting is an endless series of decisions: Natural birth or epidural? Co-sleeping or separate beds? Private or public school? Allowing them on Facebook or not? The list is infinite. ABC News recently spotlighted a parenting practice that has moms and dads with strong opinions on both sides of the debate: to leash or not to leash?Last year, Judith Goldberg, author of the “Judy on Duty” advice column for Parents magazine, wrote:“Leashes are for dogs.