Little Johnny went for a stay on Grandma & Grandpa's farm.  

First morning Johnny went off with his Pop on the tractor for the day with sandwiches and a thermos of tea for lunch.  They were out all day and when they got back Grandpa told Johnny to go into the house while he put the tractor away and did some more jobs.

Inside Grandma asked about his day.

Johnny replied telling her that they moved the F**kers to the top paddock, did some fencing, then moved the F**kers to the middle paddock....

Grandma blushed and blurted that Grandpa would not have used such language!

Johnny explained that he had in fact called them "the heifers"  but I knew what what he meant!!!