If the BO can't adequately handle the pony (i.e. catch him and bring him in to feed) then she needs to not have that pony at her farm. The pony's owner is trying to not have to be responsible for her own horse, SHE should ask the owner what the problem is and brainstorm solutions with the BO... it isn't your problem. I'm sure you could find a tactful way to say that to the pony's owner. It isn't really your business and is it worth YOU potentially offending the barn owner by being put into the position of "little birdy"?
However, I'd have to question the BO's capacity to adequately care for the animals she boards if she doesn't remedy the situation on her own, or inform the woman that she is unable to provide the necessary services for her horse because she doesn't have time to chase it around the paddock. As a BO, there is no way I would allow a situation like that to continue at my farm... it is my job to stay one step ahead of my boarders and be "on the ball" with the care of the horses in my charge. If I felt someone's horse was just too much of a pain, and that the level of "pain in the butt" was potentially detrimental to the horses health (not eating adequately, etc) I'd let the owner know and ask them how they propose to remedy the situation (i.e. training their horse). If there was nothing that the horse's owner could/would do, I'd tell them that since the health of the horses in my charge is of the utmost importance to me, and I couldn't provide that same level of care to a horse who wouldn't be caught (and I'm not willing to chase/train/etc), the horse's owner needs to seek alternate, better suited living situation for their horse. Of course, I'd give them a reasonable amount of time to re-situation themselves elsewhere. I think it would be virtually impossible for the BO to offend the owner of the horse in that regard because her concern is for the welfare of the horse (which is the BO's job).
Last edited by sillyhorses; 10-10-2011 at 12:48 PM.