What is the ruling on raising horses, racing them, and participating in such races, especially given that a portion of the prize money is deducted under the pretext of participation fees, the delayed disbursement of prizes, and the occurrence of betting on horses by other parties without the breeder's knowledge?

The basic ruling for raising and training horses is permissibility, unless it is known with certainty or highly probable that their purpose is for use in forbidden activities like gambling. In such cases, raising them is impermissible because it falls under the category of aiding in sin and transgression, and due to the rule that means take the rulings of their ends. However, if their upbringing is for permissible uses such as lawful races or other purposes, then there is no objection to it.