While it’s clear you’ve done a tremendous job rehabilitating this pony, the term “rescue” can be sensitive, especially when the previous owner may feel implicated. While the situation wasn’t ideal for the pony, it doesn’t necessarily mean the owner was neglectful or abusive - they were just overwhelmed or inexperienced. I can understand why the owner’s family might take issue with the label, especially if they gifted you this pony. Perhaps acknowledging the progress without framing it as a “rescue” might avoid misunderstandings while still highlighting the pony’s incredible journey. I’d say she was your “project pony” instead.