There are a few reasons why you might not be able to see an Enter Now button on a Show Organisers event:-

The Show Organiser may not yet have opened the event for online entries, if you are waiting on entries being opened please contact the Show Organiser directly.

Horse Monkey lists events for many equestrian associations, however not all Venues and Show Organisers have signed up to accept Horse Monkey entries, which means the show information is available but you are not able to enter via Horse Monkey.

If an event has closed for entries the Enter Now does change to a Bookings Closed notice.