And how do the bacteria get there? Do they get there if they're fed sterilized food or other cows? And are the bacteria killed off by the antibiotics they're given?
Pre-seeded during breast feeding, as happens across all mammals. How many billions of years do you want to go back on this question?
> And are the bacteria killed off by the antibiotics they're given?
Evidently not, as in developed country sick animals don't get turned into meat foods on principle and by law --- so they don't show up deficient. If they lived for 9 decades like we do, they might (or not). But they don't.
Pre-seeded during breast feeding, as happens across all mammals. How many billions of years do you want to go back on this question?
> And are the bacteria killed off by the antibiotics they're given?
Evidently not, as in developed country sick animals don't get turned into meat foods on principle and by law --- so they don't show up deficient. If they lived for 9 decades like we do, they might (or not). But they don't.