Thanks! I like that soap idea! I will have to try that if I notice chewingI think it's impressive! You have quite the can-do attitude!
Sometimes horses like to chew on wood, so keep an eye out for that; you can add metal corner strips to your posts to stop chewing on those. On plywood I've sometimes had to resort to rubbing a bar of soap on the areas they like to gnaw, tastes icky and they quit.
My horses get plenty of hay but sometimes boredom sets in...