A farmer wakes up on freezing cold day,looks out his window and see's all his cows are frozen solid?

he gets dressed and runs down to the cows,thats it i'm finished i just about managed to get through mad cow and the foot and mouth,but this will be the end of me,at that a women pes by and see's the farmers distress,my be i can help she says,at that she puts her hands on the cows nose,after a minute the cow starts to twitch and starts to run round as nothing had happened,one by one she defrosted all of them,the farmer in amazement said how can i ever repay you she said no need and walked off,a per by who watched all this went to talk to the farmer,he said did you know how that was said the per by,no replied the farmer, it was thora hird, a joke for the older gen.