Horse Health, Spook the horse has whats called a bone spur and a calcium deposit can it be cured?

My mom and I want to lease a horse named Spook, but he has a bone spur on his left knee I believe, he also has a calcium deposit built over it. What can be done to help the horse or get rid of it, can we even do anything? The horse rides well and doesn't seem to be in any apparent pain but were at a loss here. Is there a surgery that can be done or should we just not lease the horse at all? Any info about bone spurs would help me alot. Thanks!|||You might want to visit the source material website below to learn more about bone spurs.|||yes you should take it to a vet and they will help.