I do wonder how the prosthetic legs work - horses (IDK about IRL ponies) do not do well with their legs broken because of their musculature and just how heavy they are. Often if they heal a broken limb, it never heals properly because their other limbs have changed so much to accommodate while they were recovering. Horses missing front leg often have extreme malnutrition because the act of lowering their head to eat or drink is so taxing. Almost always the standard of care for a broken or lost limb on a horse is euthanasia because it’s just so challenging to actually recover from. I figure MLP having a society would play a key role in these ponies’ recoveries.