To take even animal life, requires that the shochet be wholly attuned to the serious nature of the slaughter and never callous or uncaring.
After an animal has been butchered, inspected, and forbidden parts removed, the meat still needs to have as much blood removed as possible.
Even if an animal is killed appropriately, it is still possible for it to be considered non-kosher if that the animal was ill or maimed.
The Torah says which animals are kosher and may be eaten (after an appropriate process) and which animals are not.
The Torah requires specific methods of slaughter, inspection, and preparation before acceptable animals may be eaten.
As we read the stories of Jacob, it is worthwhile to pay attention to the interplay between hope and God as the redeemer us from various Sheols.