So let's talk most efficient cow layouts?
(Might as well make this the layout thread

)
I find the best layout is in groups of 12 cows (Maximum buckets you can carry at any one time)
are cows gatetrapped horizontally triplegate connected, to illustrate:

The space inbetween the two sets of 6 is due to the movement of hearthlings, they move a little shorter of the middle each time so by the third you want a longer movement to reposition them better.
I have used this layout with much success, but 'm sure there are better based on either a full inventory or inventory+2LCs:

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