If you're really worried about halal, don't eat meat.   But don't come here pontificating about it unless you're prepared to pontificate about the widespread mistreatment of animals in general

I pay extra for organic milk, meat and eggs because the animals are reared in more natural and humane conditions.
That gives me the right to pontificate.

If veterinarians say Halal slaughter is less humane I believe them, and I want to have the choice as with "free range" "organic" "corn fed" etc.

Why do you want secrecy about it Steve?