Do as the cow o' Forfar did, tak a stannin' drink.
"A cow in passing a door in Forfar, where a tub of ale had been placed to cool, drank the whole of it. The owner of the ale pursued the proprietor of the cow for the value of the ale; but a learned bailie, in giving his decision, decreed, that since the ale was drank by the cow while standing at the door, it must be considered deoch an dorius, or stirrup cup, for which no charge could be made, without violating the ancient hospitality of Scotland."—Sir Walter Scott, Note to Waverley.
Do as the lasses do—say No, but tak it.
"Maids, in modesty, say 'No' to that which they would have the profferer construe 'Ay.'"—Shakespeare.
Do as the miller's wife o' Newlands did—she took what she had and she never wanted.
Dogs and bairns are fain o' fools.
That is, fools attract the attention of children and dogs.
Dogs bark as they are bred.
Dogs will redd swine.
"Redd," is here used in the sense of to put in order.