Hoar Frost!

I was eating my breakfast when Dad burst
in from feeding our piglets. It looked as if 
he'd had a fight with Jack Frost! He was
covered head to toe with hoar frost!
"What were you doing out there? Having
a fight with Jack Frost!?" I asked with
sarcasm. He walked over to me pulled down 
his buff, and said...
"One o' the pigs escaped. Had to chase it, catch it
an' place it back in th' pen" Explained Dad still 
puffing with tiredness. 
"Fast things they are, when they want to get away."
Puffed Dad.