If someone is doing Zabiha all day like a butcher - does he require to do tasmia by saying some words every time - if yes Why? Or having that concept in mind is enough every time he is doing that? After all that is his job especially when he is hired in a Halal meet section of a Canadian meet company.
What is wrong with saying Allah-akbar on an automated slaughter process where the chickens are slaughtered one by one tied upside down on a belt? No one is touching the animal or wrestling with them to slaughter them or using knife by hand.
What is wrong with shooting them and do the Tasmia before that and make sure tazkya is also done using modern techniques?
What is wrong with recorded Allah-akbar while doing zabiha - this is an arrangement made specifically for Muslims by Muslims establishing a concept of permission from Allah to slaughter the animal - why a live human voice is necessary for each and individual animal?
Moreover why not a Muslim can buy number of animals and before giving all of them to a slaughter machines do tasmya for all of them that all these animals are going to be slaughtered because Almighty has given me permission to do so, else I have no authority/right to take these lives.
Questions about ingredients of non-meet items such as bakery and cheese products:
How far should we go to investigate the ingredients and the source of that (in North America)?
We never do this in Pakistan, there are hundred and thousands of items that are imported in Pakistan including meet products and have the same ingredients and same sources. List of a common Haram Ingredients are as follows.
Please also have a discussion with specialized chemist / industrial chemists / applied chemists. Some have the opinion that when these ingredients are made for industrial purpose (large production) they are produced 1) artificially 2) using small quantity of animal product and then make large quantity from it chemically to use in industrial process 3) some products (such as Alcohol) lose the original properties and convert into something else after production is complete. However it is not easy for a non-technical person to know/understand theses chemical changes.