"Worthless as teats on a boar hog"

A gilt that is the daughter of a boar possessing few, misplaced, or malformed teats is genetically predisposed to the same undesirable characteristic. Hog breeders will keep gilts with at least 12 well-placed teats and will not keep others as brood sows for farrowing.

So, teats on a boar and the sow are important in brood stock.

Cruiser

Oh, to the question at hand: about as much use as a milk bucket under a bull's prepuce (unless that is all you have and need semen for artificial insemination, but I will leave THAT chore to other "handymen" and I'll handle the milking of the cows).