SAND!

I can’t stress enough how important it is for horses to have sand or otherwise course ground where they can walk on daily.
Sand helps promote circulation in the hooves and it keeps the foot growing and shedding as it should.
Without sand or course ground the hoof gets soft, breeds bacteria and doesn’t shed or grow properly causing severe sensitivity and an all around unhealthy foot.
I like gravel around gates and the water trough at the very least so you know they’re walking on course ground multiple times daily to drink. Ideally I’m very fond of my sand arena. The horses get worked for an hour or two a couple times a week in it and I have zero horses with sensitive feet, I have zero issues with thrush and they grow a beautiful foot with no stress lines!
Moral of the story, get sand or gravel. Your horse will thank you!