Can anyone recommend a yard locally (ideally within half hour of market deeping) for schooling livery? Must have a decent sized arena and ideally grass livery (stabled over night would be possible but she won't wee in her stable!) For one very well mannered 16.3hh mare? Looking for someone to work on her balance in canter, the rest of her schooling is nice but she just slips on grass and we don't have access to an arena. Thanks!