I have a buddy that is right handed but after he was shot with a b-b gun when he was younger,his right eye went blurry and hecannot make objects out very clearly. He had taught himself how to shoot left handed many years ago, probally when he was about 8 years old. He shoots both gun and bow left handed....Although it looks akward for me to watch him shoot left handed,he claims that it is very easy for him.
If you said your son can use both hands to do other duties, then maybe he can practice shootingboth ways until you guys figure out whathis eye is going to do. Because your son is still young, things could change with his dominant eye (likeNE hunter said.) Even if his dominant eye doesn't change, you will have the best darn shooter able to shoot right and left handed there is

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BOY I SURE WISH I WAS INTRODUCED TO GUNS AT 4 YEARS OLD....THAT WOULD HAVE BEEN AN EXTRA 3 YEARS OF SHOOTINGUNDER MY BELT.