Uncertain if one read bismillah when slaughtering
Q: I slaughtered a few chickens recently for personal use. I have three questions:
1. On one chicken I noticed after cleaning that the main vein in the neck was not cut, is it halal?
2. I am uncertain if I read Bismillah on one. Is it halal?
3. If any are not Halal, what must be done with them?