I don't care how many pails of milk I lose, as long as I don't lose the cow

Milk the cow that standeth still

Why buy a cow if you can get the milk for free

It doesn't matter how much milk you spill, just so long as you don't lose the cow.

Milk the cow, but do not pull off the udder.

He who wants milk should not sit in the middle of a field and wait for a cow to back up to him