I'm aware that many give Halal options. And I'm guessing the amount of options may differ depending on the community they are being sold in.

I dont know which companies are exclusively halal (that wouldn't have been previously). Have done a Google and can't lay my hands on the information.

I did read that the majority of animals used for halal food are humanely stunned first, but I'm no expert on animal slaughter so would not get into an argument about it.

I would guess the only true way to eat a diet which is cruelty free is go vegetarian or even vegan.