Originally Posted by kevinshorses
Yes you need to have it fixed. It's usually done when the horse is gelded. If it's done then it generally cost less because the horse is already sedated.
Completely depends on how large it is and what type of castration process. A normal standing castration requires the horse to be exercised to prevent too much edema to allow proper drainage at the incision site.
If the hernia is large enough - it's considered abdominal surgery which means the horse needs to have movement restricted for several days.
A normal time frame is to have the hernia repaired prior to their first birthday. As the hrose grows, it puts more weight and thus more strain on the weakness in the abdominal wall.