Everything about care for 12 year old male horses?

Answers:
a "male" horse is not generally called a "male horse" they are called either gelding or stallions.

I would guess that maybe you haven't had much experience with horses..and think it would be best if you did alot of reading and talking to vets and horse trainers etc before you get a horse.
there is ALOT to taking care of a horse (money wise, and health wise) you need to be totally educated before you get one to prevent any bad things happening to your horse.

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What specifically are you looking for? I know a lot about horses, but.. what do you need?

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i wrote a detailed response in the other post you put up. if you have any specific questions or need more info let me know.

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they need riding , lunging for exercise Senior foods grooming,lots of care. good Ferrari, vet check and shots every year. clean stall water in and outside. lots of love