I've just had someone say that they would like to take my somewhat scatty TB mare on a half livery and whilst I am very pleased that someone will be riding her 3x a week and sharing the costs I was just wondering how I best make my expectations clear? Have any of you done a contract or a letter of understanding or just a list? What works best in your experience? The girl who would be taking her on is 14 and I must admit I really do want to lay down the law a bit although I do trust her not to do anything stupid. Any advice?