For grazing purposes, there is no wait time between spraying and grazing.
There is a 7 - 10 day wait to cut for forage.
Grazon was designed to allow grazing immediately. Do not use manure from livestock that have been fed forage treated with Grazon on your garden unless it has been composted for 18 months. The chemical passes through the digestive system, but will remain in the manure. It will kill your veggies unless you compost it for at least 18 months.