Sorry it took so long to reply, I'm sick at the moment but I give my chicken 25mcg once a day, some people said they give theirs 50 mcg once every other day. But I was worried that, that would cause a spike in selenium in the body every other day instead of a constant amount selenium so I give it daily. The bottle also says for people to take it daily so I thought that it may be metabolized to quickly to last multiple days but that is my take on the situation. Their are probably a million opinions on the subject but I hope it helps. Also I know if you give to much it can be harmful.
I also forgot to mention that I'm trying B complex now. I seems to be helping but he is still not able to walk straight. The improvement is mostly that he seems to have more energy.