To help with fireworks fear in your horses and dogs, it is best to start feeding it 4-7 days before the event (many areas use fireworks for any celebration). With the 4th this year on a Monday, likely there will be fireworks parties over the weekend. So, starting a full week before the 4th would be a good idea. If you have been feeding CBD and know your animal is very fearful, you can significantly increase the amount a week before and give an extra serving the day of. The last feeding of it can be about an hour before the main part of the event.
CBD affects the endocannabinoid system in the brain. The endocannabinoid system is essential in the balance for the flight or fight system that gets activated by the fear. The endocannabinoids are part of the forgive and forget system.