[aaron695]

When you inoculate cattle rumen normally the shared water trough keeps it going. So you might inoculate some cattle then the rest will also get inoculated. It might even be tied individual cows losing the inoculation, the herd can keep it going.

Similarly having camels with cattle does this, since camels naturally have gut bacteria of value they pass it on through shared water.

Once thing I noticed going from sharing a beer with our goats to soft drink, beer being a brown bottle, soft drink being clear there would be a lot of cud in the bottle.

Of course in modern society digesting plants more efficiently is bad. More energy makes you fatter and roughage is good.